so as to be or remain supported by or suspended from: Put your package down on the table; Hang your coat on the hook.
so as to be attached to or unified with: Hang the picture on the wall. Paste the label on the package.
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.
in connection, association, or cooperation with; as a part or element of: to serve on a jury.
so as to be a supporting part, base, backing, etc., of: a painting on canvas; mounted on cardboard; legs on a chair.
(used to indicate place, location, situation, etc.): a scar on the face; the book on the table; a house on 19th Street.
(used to indicate immediate proximity): a house on the lake; to border on absurdity.
in the direction of: on the left; to sail on a southerly course.
(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.
by the agency or means of: drunk on wine; talking on the phone; I saw it on television.
in addition to: millions on millions of stars.
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.
in a state or condition of; in the process of: on strike; The house is on fire!
subject to: a doctor on call.
engaged in or involved with: He's on the second chapter now.
(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.
(used to indicate a basis or ground): on my word of honor; The movie is based on the book.
(used to indicate risk or liability): on pain of death.
(used to indicate progress toward or completion of an objective): We completed the project on budget.
assigned to or occupied with; operating: Who's on the switchboard this afternoon?
Informal. so as to disturb or affect adversely: My hair dryer broke on me.
Informal. paid for by, especially as a treat or gift: Dinner is on me.
taking or using as a prescribed measure, cure, or the like: The doctor had her on a low-salt diet.
regularly taking or addicted to: He was on drugs for two years.
Informal. with; carried by: I have no money on me.
(used to indicate time or occasion): on Sunday; We demand cash on delivery.
(used to indicate the object or end of motion): to march on the capital.
(used to indicate the object or end of action, thought, desire, etc.): to gaze on a scene.
(used to indicate subject, reference, or respect): views on public matters.
(used to indicate an encounter): The pickpocket crept up on a victim.
