[on, awn] 
| 1. | so as to be or remain supported by or suspended from: Put your package down on the table; Hang your coat on the hook. |
| 2. | so as to be attached to or unified with: Hang the picture on the wall. Paste the label on the package. |
| 3. | so as to be a covering or wrapping for: Put the blanket on the baby. Put aluminum foil on the lamb chops before freezing them. |
| 4. | in connection, association, or cooperation with; as a part or element of: to serve on a jury. |
| 5. | so as to be a supporting part, base, backing, etc., of: a painting on canvas; mounted on cardboard; legs on a chair. |
| 6. | (used to indicate place, location, situation, etc.): a scar on the face; the book on the table; a house on 19th Street. |
| 7. | (used to indicate immediate proximity): a house on the lake; to border on absurdity. |
| 8. | in the direction of: on the left; to sail on a southerly course. |
| 9. | (used to indicate a means of conveyance or a means of supporting or supplying movement): on the wing; This car runs on electricity. Can you walk on your hands? I'll be there on the noon plane. |
| 10. | by the agency or means of: drunk on wine; talking on the phone; I saw it on television. |
| 11. | in addition to: millions on millions of stars. |
| 12. | with respect or regard to (used to indicate the object of an action directed against or toward): Let's play a joke on him. Write a critical essay on Shakespeare. |
| 13. | in a state or condition of; in the process of: on strike; The house is on fire! |
| 14. | subject to: a doctor on call. |
| 15. | engaged in or involved with: He's on the second chapter now. |
| 16. | (used to indicate a source or a person or thing that serves as a source or agent): a duty on imported goods; She depends on her friends for encouragement. |
| 17. | (used to indicate a basis or ground): on my word of honor; The movie is based on the book. |
| 18. | (used to indicate risk or liability): on pain of death. |
| 19. | (used to indicate progress toward or completion of an objective): We completed the project on budget. |
| 20. | assigned to or occupied with; operating: Who's on the switchboard this afternoon? |
| 21. | Informal. so as to disturb or affect adversely: My hair dryer broke on me. |
| 22. | Informal. paid for by, esp. as a treat or gift: Dinner is on me. |
| 23. | taking or using as a prescribed measure, cure, or the like: The doctor had her on a low-salt diet. |
| 24. | regularly taking or addicted to: He was on drugs for two years. |
| 25. | Informal. with; carried by: I have no money on me. |
| 26. | (used to indicate time or occasion): on Sunday; We demand cash on delivery. |
| 27. | (used to indicate the object or end of motion): to march on the capital. |
| 28. | (used to indicate the object or end of action, thought, desire, etc.): to gaze on a scene. |
| 29. | (used to indicate subject, reference, or respect): views on public matters. |
| 30. | (used to indicate an encounter): The pickpocket crept up on a victim. |
| 31. | in, into, or onto a position of being supported or attached: Sew the buttons on. |
| 32. | in, into, or onto a position of covering or wrapping: Put your raincoat on. |
| 33. | fast to a thing, as for support: Hold on! |
| 34. | toward a place, point, activity, or object: to look on while others work. |
| 35. | forward, onward, or along, as in any course or process: further on. |
| 36. | with continuous activity: to work on. |
| 37. | into or in active operation or performance: Turn the gas on. |
| 38. | operating or in use: The television set was on. Is your brake on? |
| 39. | taking place; occurring: Don't you know there's a war on? |
| 40. | performing or broadcasting: The radio announcer told us we were on. |
| 41. | Informal.
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| 42. | scheduled or planned: Anything on after supper? |
| 43. | Baseball. positioned on a base or bases: They had two men on when he hit the home run. |
| 44. | Cricket. noting that side of the wicket, or of the field, on which the batsman stands. |
| 45. | Cricket. the on side. |
| 46. | on and off, off (def. 22a). |
| 47. | on and on, at great length, so as to become tiresome: They rambled on and on about their grandchildren. |
| 48. | on the bow, Nautical. bow 3 (def. 8). |
| 49. | on to, aware of the true nature, motive, or meaning of: I'm on to your little game. |
| ONS Oncology Nursing Society |