<HEAD><TITLE>DICTIONARY: once - one-class</TITLE></HEAD>
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<A NAME="once">
<B>once, </B>adverb, noun, conjunction, adjective.<DL COMPACT><DD><I>adv. </I> <B>1. </B>one time. <BR> <I>Ex. Read it once more. He comes once a day. A man can die but once (Shakespeare).</I> <DD><B> 2. </B>at some one time in the past; formerly. <BR> <I>Ex. a once powerful nation. That big man was once a little baby.</I> <DD><B> 3. </B>even a single time; ever. <BR> <I>Ex. if the facts once become known; once seen, never forgotten.</I> <DD><B> 4. </B>(Archaic.) at some future time. <BR> <I>Ex. meditating that she must die once (Shakespeare).</I> <DD><I>noun </I> a single occasion. <BR> <I>Ex. Once is enough. I think he might as well have favoured me this once (Shelley).</I> <DD><I>conj. </I> if ever; whenever. <BR> <I>Ex. Most boys like to swim once they have learned how. Once you cross the river you are safe.</I> <DD><I>adj. </I> former. <BR> <I>Ex. a once friend.</I> (SYN) quondam. <BR><I>expr. <B>all at once,</B> </I>suddenly. <BR> <I>Ex. All at once the sun disappeared and rain began to fall.</I> <BR><I>expr. <B>at once,</B> <DD><B> a. </B>immediately. </I> <I>Ex. You must come at once.</I> <DD><B> b. </B>at one and the same time. <BR> <I>Ex. All three boys spoke at once.</I> <BR><I>expr. <B>for once,</B> </I>for one time at least. <BR> <I>Ex. For once I wasn't thinking of you. I had other things in mind (Graham Greene).</I> <BR><I>expr. <B>once and again,</B> </I>repeatedly. <BR> <I>Ex. That good woman would open the door once and again in the morning, and put her head through (Mrs. Humphry Ward).</I> <BR><I>expr. <B>once</B> (<B>and</B>) <B>for all.</B> </I>See under <B>all.</B> <BR><I>expr. <B>once in a while.</B> </I>See under <B>while.</B> <BR><I>expr. <B>once or twice,</B> </I>a few times. <BR> <I>Ex. So the merchants ... lodged without Jerusalem once or twice (Nehemiah 13:20)</I> <BR><I>expr. <B>once upon a time.</B> </I>See under <B>time.</B> </DL>
<A NAME="onceover">
<B>once-over, </B>noun.<DL COMPACT><DD> (Informal.) a short, quick look, as for inspection or evaluation. <BR> <I>Ex. to give the new plans a quick once-over.</I> </DL>
<A NAME="onceoverlightly">
<B>once-over-lightly, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> (Informal.) a light or superficial look, as for inspection or evaluation; a casual once-over. <BR> <I>Ex. The religious essays ... are a once-over-lightly in the principles of Catholicism (Time).</I> <DD><I>adj. </I> superficial; casual. <BR> <I>Ex. once-over-lightly coverage of the news.</I> </DL>
<A NAME="onchocerciasis">
<B>onchocerciasis, </B>noun.<DL COMPACT><DD> a tropical disease that causes nodules under the skin and lesions of the eye which may result in blindness; river blindness. It is caused by a filarial worm whose carrier is a gnat. </DL>
<A NAME="oncidium">
<B>oncidium, </B>noun.<DL COMPACT><DD> any one of a group of tropical American epiphytic orchids. Some kinds have flowers resembling butterflies. </DL>
<A NAME="oncogen">
<B>oncogen, </B>noun.<DL COMPACT><DD> a tumor-producing virus or other agent; oncogenic substance or organism. </DL>
<A NAME="oncogene">
<B>oncogene, </B>noun.<DL COMPACT><DD> a tumor-producing gene. <BR> <I>Ex. The theory itself states that human cancer is viral in origin and is caused by a more or less hypothetical entity called the oncogene (Harper's).</I> </DL>
<A NAME="oncogenesis">
<B>oncogenesis, </B>noun.<DL COMPACT><DD> the process of forming or producing tumors. </DL>
<A NAME="oncogenic">
<B>oncogenic, </B>adjective.<DL COMPACT><DD> having to do with or producing tumors; tending to produce tumors. </DL>
<A NAME="oncogenicity">
<B>oncogenicity, </B>noun.<DL COMPACT><DD> the quality or condition of being oncogenic. </DL>
<B>oncological, </B>adjective.<DL COMPACT><DD> of or having to do with oncology. <BR> <I>Ex. [Russia] has embarked on a nationwide specialist oncological service to deal with all growth disorders, benign and malignant (London Times).</I> </DL>
<A NAME="oncologist">
<B>oncologist, </B>noun.<DL COMPACT><DD> a person who studies, or knows much about, oncology. </DL>
<A NAME="oncology">
<B>oncology, </B>noun.<DL COMPACT><DD> the branch of medicine dealing with the study of tumors. </DL>
<A NAME="oncolytic">
<B>oncolytic, </B>adjective.<DL COMPACT><DD> of or having to do with the destruction of cells comprising a tumor. <BR> <I>Ex. oncolytic properties.</I> </DL>
<A NAME="oncoming">
<B>oncoming, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> approaching or advancing. <BR> <I>Ex. oncoming winter, the oncoming tide, oncoming traffic.</I> <DD><I>noun </I> approach; advance. <BR> <I>Ex. the oncoming of the storm; the oncoming of numbness (George Eliot).</I> </DL>
<A NAME="oncornavirus">
<B>oncornavirus, </B>noun.<DL COMPACT><DD> any one of a group of viruses that produce tumors and contain ribonucleic acid. <BR> <I>Ex. Professor W. F. H. Jarrett ... spoke of the oncornaviruses particularly in fowls, mice and cats, in which they can lead to leukemia or sarcoma (Nature).</I> </DL>
<B>on-ding, </B>noun.<DL COMPACT><DD> (Scottish.) a very heavy fall of rain or snow. </DL>
<A NAME="ondit">
<B>on dit,</B><DL COMPACT><DD> (French.) <DD><B> 1. </B>they say; it is said. <DD><B> 2. </B>a piece of gossip; report. <BR> <I>Ex. I thought it was a mere on dit (Benjamin Disraeli).</I> </DL>
<A NAME="ondogram">
<B>ondogram, </B>noun.<DL COMPACT><DD> a record made by an ondograph. </DL>
<A NAME="ondograph">
<B>ondograph, </B>noun.<DL COMPACT><DD> an instrument for recording the oscillatory variations of electric currents, especially of alternating currents. </DL>
<A NAME="ondometer">
<B>ondometer, </B>noun.<DL COMPACT><DD> a device for measuring the length of radio waves. </DL>
<A NAME="ondrive">
<B>on-drive, </B>noun, verb, <B>-drove,</B> <B>-driven,</B> <B>-driving.</B><DL COMPACT><DD> (Cricket.) <DD><I>noun </I> a drive to the right side of the field when a right-handed batsman is batting or the left side when a left-handed batsman is batting. <DD><I>v.i., v.t. </I> to hit an on-drive (of a bowler's delivery). </DL>
<A NAME="one">
<B>one, </B>noun, adjective, pronoun.<DL COMPACT><DD><I>noun </I> <B>1. </B>the first and lowest whole number; the number 1. <DD><B> 2. </B>a single person or thing indicated. <BR> <I>Ex. I like the ones in that box. I gave him the one he wanted. Is this the one I gave you? Are you the one who is going to help?</I> <DD><I>adj. </I> <B>1. </B>being a single unit or individual. <BR> <I>Ex. one apple, one dollar. A person has one head and one neck.</I> (SYN) a, any. <DD><B> 2. </B>some. <BR> <I>Ex. One day he will be sorry.</I> <DD><B> 3. </B>of a single kind, nature, or character; the same. <BR> <I>Ex. All face one way. They held one opinion. Graphite and diamond are chemically one substance.</I> (SYN) identical. <DD><B> 4. </B>joined together; united. <BR> <I>Ex. The class was one in its approval. They replied in one voice.</I> (SYN) undivided. <DD><B> 5. </B>a certain; particular. <BR> <I>Ex. A short speech was made by one John Smith.</I> <DD><I>pron. </I> <B>1. </B>some person or thing. <BR> <I>Ex. Two may go, but one must stay. One of Longfellow's poems was chosen for the new reader.</I> <DD><B> 2. </B>any person standing for people in general. <BR> <I>Ex. One does not like to be left out. One must work hard to achieve success.</I> <DD><B> 3. </B>the same person or thing. <BR> <I>Ex. In Robert Louis Stevenson's story, Doctor Jekyll and Mr. Hyde were one and the same.</I> <BR><I>expr. <B>all one,</B> <DD><B> a. </B>just the same. </I> <I>Ex. 'Twere all one That I should love a bright particular star, And think to wed it, he is so above me (Shakespeare).</I> <DD><B> b. </B>making no difference; of no consequence. <BR><I>expr. <B>at one,</B> </I>in agreement or harmony. <BR> <I>Ex. The two judges were at one about the winner. Where Conservative and Labour critics of the Government's policy are at one is their common belief that the Prices and Incomes Bill will not achieve the restraints which the Government desires (Manchester Guardian Weekly).</I> <BR><I>expr. <B>make one,</B> <DD><B> a. </B>to form or be one of a number, assembly, or party. </I> <I>Ex. I made one upon that winter's journey of which so many tales have gone abroad (Robert Louis Stevenson).</I> <DD><B> b. </B>to join together; unite in marriage. <BR> <I>Ex. The parson pronounced the words that made the couple one.</I> <BR><I>expr. <B>one and all,</B> </I>everyone. <BR> <I>Ex. Towards this great end it behooves us one and all to work (London Daily News).</I> <BR><I>expr. <B>one by one,</B> </I>one after another. <BR> <I>Ex. They came out the door one by one. As the teacher called out our names, we stepped up one by one to receive our report cards.</I> <BR><I>expr. <B>one or two,</B> </I>a few. <BR> <I>Ex. The book was never popular and only one or two copies were sold in the larger bookstores.</I> <BR><I>expr. <B>one up on,</B> </I>(Informal.) an advantage over. <BR> <I>Ex. The objects of human vituperation ... seem to be pretty well limited to people who are one up on us, and other people's pleasure (Listener).</I> </DL>
<A NAME="one">
<B>-one,</B><DL COMPACT><DD> (suffix.) ketone, as in <I>acetone, progesterone.</I> </DL>
<A NAME="oneacter">
<B>one-acter, </B>noun.<DL COMPACT><DD> (Informal.) a one-act play or opera. </DL>
<A NAME="oneanother">
<B>one another,</B><DL COMPACT><DD> one the other; each other. <BR> <I>Ex. They struck at one another. They were in one another's way.</I> </DL>
<A NAME="onearmbandit">
<B>one-arm bandit,</B><DL COMPACT><DD> (U.S. Slang.) a gambling device having a lever at one side, operated by dropping a coin into a slot; slot machine. </DL>
<B>one-bagger, </B>noun.<DL COMPACT><DD> (Baseball Slang.) a one-base hit; single. </DL>
<A NAME="onebasehit">
<B>one-base hit,</B><DL COMPACT><DD> (Baseball.) a hit that allows the batter to reach first base only; single. </DL>
<A NAME="onecelled">
<B>one-celled, </B>adjective.<DL COMPACT><DD> having only one cell. <BR> <I>Ex. one-celled protozoa.</I> </DL>
<A NAME="oneclass">
<B>one-class, </B>adjective.<DL COMPACT><DD><B> 1. </B>providing the same accommodations for all passengers. <BR> <I>Ex. a one-class airline service.</I> <DD><B> 2. </B>of or for one class of people only; exclusive. <BR> <I>Ex. a one-class school, a one-class club.</I> </DL>
