1. (prep.) The general signification of on is situation, motion, or condition with respect to contact or support beneath

2. (prep.) At, or in contact with, the surface or upper part of a thing, and supported by it; placed or lying in contact with the surface; as, the book lies on the table, which stands on the floor of a house on an island.

3. (prep.) To or against the surface of; -- used to indicate the motion of a thing as coming or falling to the surface of another; as, rain falls on the earth.

4. (prep.) Denoting performance or action by contact with the surface, upper part, or outside of anything; hence, by means of; with; as, to play on a violin or piano. Hence, figuratively, to work on one's feelings; to make an impression on the mind.

5. (prep.) At or near; adjacent to; -- indicating situation, place, or position; as, on the one hand, on the other hand; the fleet is on the American coast.

6. (prep.) In addition to; besides; -- indicating multiplication or succession in a series; as, heaps on heaps; mischief on mischief; loss on loss; thought on thought.

7. (prep.) Indicating dependence or reliance; with confidence in; as, to depend on a person for assistance; to rely on; hence, indicating the ground or support of anything; as, he will promise on certain conditions; to bet on a horse.

8. (prep.) At or in the time of; during; as, on Sunday we abstain from labor. See At (synonym).

9. (prep.) At the time of, conveying some notion of cause or motive; as, on public occasions, the officers appear in full dress or uniform. Hence, in consequence of, or following; as, on the ratification of the treaty, the armies were disbanded.

10. (prep.) Toward; for; -- indicating the object of some passion; as, have pity or compassion on him.

11. (prep.) At the peril of, or for the safety of.

12. (prep.) By virtue of; with the pledge of; -- denoting a pledge or engagement, and put before the thing pledged; as, he affirmed or promised on his word, or on his honor.

13. (prep.) To the account of; -- denoting imprecation or invocation, or coming to, falling, or resting upon; as, on us be all the blame; a curse on him.

14. (prep.) In reference or relation to; as, on our part expect punctuality; a satire on society.

15. (prep.) Of.

16. (prep.) Occupied with; in the performance of; as, only three officers are on duty; on a journey.

17. (prep.) In the service of; connected with; of the number of; as, he is on a newspaper; on a committee.

18. (prep.) Forward, in progression; onward; -- usually with a verb of motion; as, move on; go on.

19. (prep.) Forward, in succession; as, from father to son, from the son to the grandson, and so on.

20. (prep.) In continuance; without interruption or ceasing; as, sleep on, take your ease; say on; sing on.

21. (prep.) Adhering; not off; as in the phrase, He is neither on nor off, that is, he is not steady, he is irresolute.

22. (prep.) Attached to the body, as clothing or ornament, or for use.

23. (prep.) In progress; proceeding; as, a game is on.

about above accidental accompanying across ado afloat afoot after which against ahead along among anent apropos of as for as regards as respects as to astraddle astride at atop by by dint of by means of by use of by virtue of by way of circumstantial concerning current doing en route to eventuating for forth forward forwards from going on happening headed for hereby hereinafter herewith horseback in in connection with in contact with in hand in passage to in point of in re in reference to in regard to in relation to in relation with in respect to in the wind in transit to in virtue of incidental near next to occasional occurring of on foot on horseback on route to on top of ongoing onward onwards opposite over over against passing per pertaining to pertinent to prevailing prevalent re referring to regarding relating to relative to respecting resultant speaking of straddle straddle-legged straddleback taking place thanks to thereby therewith through to touching toward towards under way up up against upon upon which versus vis-a-vis whereat whereby wherefore whereon whereto whereunto whereupon wherewith wherewithal with with regard to with respect to


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