<B>omnipresence, </B>noun.<DL COMPACT><DD> presence everywhere at the same time. <BR> <I>Ex. God's omnipresence. His omnipresence fills Land, sea, and air (Milton).</I> (SYN) ubiquity. </DL>
<A NAME="omnipresent">
<B>omnipresent, </B>adjective.<DL COMPACT><DD><B> 1. </B>present everywhere at the same time: ubiquitous. <BR> <I>Ex. the omnipresent God (William Godwin).</I> <DD><B> 2. </B>found everywhere. <BR> <I>Ex. the omnipresent Times newspaper (Alexander W. Kinglake).</I> </DL>
<A NAME="omnirange">
<B>omnirange, </B>noun.<DL COMPACT><DD> a navigational system for aircraft, in which position is determined by picking up omnidirectional radio signals from a ground station. </DL>
<A NAME="omniscience">
<B>omniscience, </B>noun.<DL COMPACT><DD> knowledge of everything; complete or infinite knowledge. <BR> <I>Ex. For many patients the notionthat the doctor lacks omniscience or omnipotence in his domain is extremely disturbing (Scientific American).</I> </DL>
<A NAME="omniscience">
<B>Omniscience, </B>noun. <B>=God.</B> <I>Ex. the eye of Omniscience.</I> </DL>
<A NAME="omniscient">
<B>omniscient, </B>adjective.<DL COMPACT><DD> knowing everything; having complete or infinite knowledge. <BR> <I>Ex. By no means trust to your own judgment alone; for no man is omniscient (Francis Bacon).</I> adv. <B>omnisciently.</B> </DL>
<A NAME="omniscient">
<B>Omniscient, </B>noun. <B>=God.</B></DL>
<A NAME="omnitude">
<B>omnitude, </B>noun.<DL COMPACT><DD> the state or fact of being or comprising all; universality. </DL>
<B>omnivore, </B>noun.<DL COMPACT><DD> an omnivorous animal or person. </DL>
<A NAME="omnivorous">
<B>omnivorous, </B>adjective.<DL COMPACT><DD><B> 1. </B>eating every kind of food. <DD><B> 2. </B>eating both animal and vegetable food. <BR> <I>Ex. Man is an omnivorous animal.</I> <DD><B> 3. </B>(Figurative.) taking in everything; fond of all kinds. <BR> <I>Ex. An omnivorous reader reads all kinds of books.</I> adv. <B>omnivorously.</B> noun <B>omnivorousness.</B> </DL>
<A NAME="omophagia">
<B>omophagia, </B>noun.<DL COMPACT><DD> the eating of raw flesh or raw food. </DL>
<B>omophagist, </B>noun.<DL COMPACT><DD> an eater of raw flesh. </DL>
<A NAME="omophagous">
<B>omophagous, </B>adjective.<DL COMPACT><DD> eating raw flesh or raw food. </DL>
<A NAME="omoplate">
<B>omoplate, </B>noun.<DL COMPACT><DD> the shoulder blade or scapula. </DL>
<A NAME="omphale">
<B>Omphale, </B>noun.<DL COMPACT><DD> (Greek Mythology.) a queen of Lydia whom Hercules had to serve for three years, dressed as a woman, to atone for a murder. </DL>
<A NAME="omphalitis">
<B>omphalitis, </B>noun.<DL COMPACT><DD> inflammation of the navel in young animals. </DL>
<A NAME="omphalos">
<B>omphalos, </B>noun, pl. <B>-li.</B><DL COMPACT><DD><B> 1. </B><B>=navel.</B> <DD><B> 2. </B>(Figurative.) a central point or part; center; hub. <DD><B> 3. </B>a round or conical stone in the temple of Apollo at Delphi, believed by the ancient Greeks to mark the center of the earth. </DL>
<A NAME="omphaloskepsis">
<B>omphaloskepsis, </B>noun.<DL COMPACT><DD> the act of gazing steadily at one's navel in the process of mystical contemplation. <BR> <I>Ex. Omphaloskepsis, then, is no longer the metier of only the Buddhists (Time).</I> </DL>
<A NAME="oms">
<B>O.M.S.,</B><DL COMPACT><DD><B> 1. </B>orbital maneuvering system. <BR> <I>Ex. Using the two 6,000-pound thrust engines ... O.M.S. 1 will be moving Columbia forward and higher on her flight path (Neil B. Hutchinson).</I> <DD><B> 2. </B>output per man-shift. </DL>
<A NAME="on">
<B>on, </B>preposition, adverb, adjective, noun.<DL COMPACT><DD><I>prep. </I> <B>1. </B>above and supported by. <BR> <I>Ex. to stand on one foot, to ride on a train. The book is on the table.</I> <DD><B> 2. </B>touching so as to cover or be around. <BR> <I>Ex. a blister on one's heel, shoes on one's feet, a ring on one's finger.</I> <DD><B> 3. </B>close to; near. <BR> <I>Ex. a house on the shore, to border on absurdity.</I> <DD><B> 4. </B>in the direction of; toward. <BR> <I>Ex. The invading soldiers marched on the Capitol.</I> <DD><B> 5. </B>against; upon. <BR> <I>Ex. The picture is on the wall.</I> <DD><B> 6. </B>by means of; by the use of. <BR> <I>Ex. to talk on the telephone. This news is on good authority.</I> <DD><B> 7. </B>in the condition of; in the process of; in the way of. <BR> <I>Ex. on duty, on half pay, on fire, on purpose, on sale.</I> <DD><B> 8. </B>at the time of; during. <BR> <I>Ex. They greeted us on our arrival.</I> <DD><B> 9. </B>concerning; in relation to; in connection with. <BR> <I>Ex. a book on animals, a poem on winter.</I> <DD><B> 10. </B>for the purpose of. <BR> <I>Ex. He went on an errand.</I> <DD><B> 11. </B>in addition to. <BR> <I>Ex. Defeat on defeat discouraged them.</I> <DD><B> 12. </B>among. <BR> <I>Ex. on a team. I am on the committee considering new members for our club.</I> <DD><B> 13. </B>indicating risk or liability. <BR> <I>Ex. on pain of death.</I> <DD><I>adv. </I> <B>1. </B>on something or someone. <BR> <I>Ex. The walls are up, and the roof is on. Put on a clean shirt.</I> <DD><B> 2. </B>to something. <BR> <I>Ex. Hold on, or you may fall.</I> <DD><B> 3. </B>toward something. <BR> <I>Ex. Some played; the others looked on.</I> <DD><B> 4. </B>farther. <BR> <I>Ex. March on.</I> <DD><B> 5. </B>in or into a condition, process, manner, or action. <BR> <I>Ex. Turn the gas on.</I> <DD><B> 6. </B>from a time; forward. <BR> <I>Ex. later on, from that day on.</I> <DD><I>adj. </I> <B>1. </B>taking place. <BR> <I>Ex. The race is on.</I> <DD><B> 2. </B>near. <BR> <I>Ex. the on side.</I> <DD><B> 3. </B>in operation; operating. <BR> <I>Ex. The radio is on. The brake is on.</I> <DD><B> 4. </B>(Cricket.) of or on the side of the wicket or the field on which the batsman stands. <DD><B> 5. </B>(British Slang.) <DD><B> a. </B>effective; working. <BR> <I>Ex. "So you see, old boy, that while I agree with you, denationalization just isn't on: Labour's made such a howling mess of these industries that no one in his senses would ever buy them back!" (Punch).</I> <DD><B> b. </B>knowing; aware. <BR> <I>Ex. Says Whiteley [aLondon painter] "Dylan is ... the most on person in America" (Time).</I> <DD><I>noun </I> (Cricket.) the on side <BR><I>expr. <B>and so on.</B> </I>See under <B>so</B> (1). <BR><I>expr. <B>have nothing on.</B> </I>See under <B>have.</B> <BR><I>expr. <B>have on.</B> </I>See under <B>have.</B> <BR><I>expr. <B>on and off,</B> </I>at some times and not at others; now and then. <BR> <I>Ex. He looked out of the window on and off.</I> <BR><I>expr. <B>on and on,</B> </I>without stopping. <BR> <I>Ex. The woman talked on and on throughout the whole afternoon.</I> <BR><I>expr. <B>on to,</B> </I>(Slang.) aware of the truth about. <BR> <I>Ex. Some of the kids are sweet, though I have a feeling they're on to me (Punch).</I> <BR><I>expr. <B>put on.</B> </I>See under <B>put</B> (1). </DL>
<A NAME="on">
<B>-on,</B><DL COMPACT><DD> (suffix.) <DD><B> 1. </B>(Physics.) <DD><B> a. </B>a nuclear particle, as in <I>neutron, dyon, parton.</I> <DD><B> b. </B>any unit particle or quantum of energy, as in <I>photon, graviton, exciton.</I> <DD><B> 2. </B>(Genetics.) a unit of genetic material, as in <I>operon, cistron.</I> <DD><B> 3. </B>(Chemistry.) a variant of <B>-one,</B> used for a compound that is not a ketone, as in <I>diuron.</I> </DL>
<A NAME="on">
<B>ON</B> (no periods), <B>O.N.,</B> or <B>ON.,</B><DL COMPACT><DD> Old Norse. </DL>
<A NAME="ona">
<B>Ona, </B>noun, pl. <B>-na</B> or <B>-nas.</B><DL COMPACT><DD> a member of a tribe of American Indians formerly living on the island of Tierra del Fuego at the southernmost tip of South America. <BR> <I>Ex. The Ona hunted the guanaco, a small wild relative of the llama (Charles Wagley).</I> </DL>
<A NAME="onagainoffagain">
<B>on-again off-again,</B> or <B>on-again-off-again, </B>adjective.<DL COMPACT><DD> that is not steadily pursued or carried out; wavering; faltering; inconclusive; unresolved. <BR> <I>Ex. The fund was meant to free economic aid from the jerking, jolting, on-again-off-again procedures imposed by the annual cycle of appropriations (Economist).</I> </DL>
<A NAME="onager">
<B>onager, </B>noun, pl. <B>-gri,</B> <B>-gers.</B><DL COMPACT><DD><B> 1. </B>a wild ass of the dry plains of western central Asia, light brownish with a black stripe along its back. <DD><B> 2. </B>an ancient and medieval machine of war for throwing stones. </DL>
<A NAME="onagraceous">
<B>onagraceous, </B>adjective.<DL COMPACT><DD> belonging to the evening-primrose family. </DL>
<A NAME="onandoff">
<B>on-and-off, </B>adjective. <B>=off-and-on.</B> <I>Ex. After on-and-off contract negotiations for several months, the union called a strike (Wall Street Journal).</I> </DL>
<B>onanist, </B>noun.<DL COMPACT><DD> a person who practices onanism. </DL>
<A NAME="onanistic">
<B>onanistic, </B>adjective.<DL COMPACT><DD> having to do with or characteristic of onanism. </DL>
<A NAME="onboard">
<B>on-board, </B>adjective.<DL COMPACT><DD> on or within a vehicle; installed aboard. <BR> <I>Ex. The Gemini 5 rendezvous experiment [was] the first to use an on-board computer linked with on-board radar (New York Times).</I> </DL>
