Meaning

• To switch on

  "Can you on the light?"

Meaning

• In the state of being active, functioning or operating.

  "All the lights are on, so they must be home."

• Performing according to schedule; taking place.

  "Are we still on for tonight?"

• Fitted; covering; being worn.

  "I was trying to drink out of the bottle while the top was still on!"

• (usually negative) Acceptable, appropriate.

  "You can't do that; it's just not on."

• Destined, normally in the context of a challenge being accepted; involved, doomed.

  ""Five bucks says the Cavs win tonight." ―"You're on!""

• Having reached a base as a runner and being positioned there, awaiting further action from a subsequent batter.

• Within the half of the field on the same side as the batsman's legs; the left side for a right-handed batsman.

  "Ponsonby-Smythe hit a thumping on drive."

• Menstruating.

Meaning

• To an operating state.

  "turn the television on"

• So as to cover or be fitted.

  "Put on your hat and gloves."

• Along, forwards (continuing an action).

  "drive on, rock on"

• In continuation, at length.

  "He rambled on and on."

• (obsolete in the US) Later.

  "Ten years on, nothing had changed in the village."

• Of betting odds, denoting a better-than-even chance. See also odds-on.

  "That horse is twenty-to-one on, so you need to stake twenty pounds just to win one pound."

Meaning

• Positioned at the upper surface of, touching from above.

  "A vase of flowers stood on the table."

• Positioned at or resting against the outer surface of; attached to.

  "He had a scar on the side of his face."

• Expressing figurative placement or attachment.

  "All of the responsibility is on him."

• Denoting performance or action by contact with the surface, upper part, or outside of anything; hence, by means of; with.

  "to play on a violin or piano"

• At or in (a certain region or location).

  "The lighthouse that you can see is on the mainland."

• Near; adjacent to; alongside.

  "Croton-on-Hudson, Rostov-on-Don, Southend-on-Sea"

• Supported by (the specified part of itself).

  "A table can't stand on two legs."

• So as to impart force to.

  "tug on the rope; push hard on the door"

• So as to impact; against.

  "I stubbed my toe on an old tree stump."

• Covering.

  "He wore old shoes on his feet."

• (with certain modes of transport, especially public transport) Inside (a vehicle) for the purpose of travelling.

  "on a bus, on a train, on a plane"

• At the date of.

  "Born on the 4th of July."

• Some time during the day of.

  "Can I see you on a different day?"

• At a given time after the start of something; at.

  "Smith scored again on twelve minutes, doubling Mudchester Rovers' lead."

• Dealing with the subject of; about; concerning.

  "I have no opinion on this subject."

• In the possession of.

  "I haven't got any money on me."

• Because of, or due to.

  "to arrest someone on suspicion of bribery"

• Upon; at the time of (and often because of).

  "On Jack's entry, William got up to leave."

• Paid for by.

  "I paid for the airfare and meals for my family, but the hotel room was on the company."

• Indicating a means or medium.

  "Can't you see I'm on the phone?"

• Indicating the target of, or thing affected by, an event or action.

  "Her words made a lasting impression on my mind."

• Toward; for; indicating the object of an emotion.

  "Have pity or compassion on him."

• Indicating a means of subsistence.

  "The dog survived three weeks on rainwater."

• Away or occupied with (e.g. a scheduled activity).

  "He's on his lunch break."

• Regularly taking (a drug).

  "He's acting so strangely, I think he must be on something."

• Under the influence of (a drug).

  "He's acting crazy because he's on crack right now."

• Having identical domain and codomain.

  "a function on"

• Having V^n as domain and V as codomain, for some set V and integer n.

  "an operator on"

• Generated by.

  "the free group on four letters"

• In addition to; besides; indicating multiplication or succession in a series.

  "heaps on heaps of food"

• Of

• Indicating dependence or reliance; with confidence in.

  "He will promise on certain conditions."

• At the peril of, or for the safety of.

• In the service of; connected with; of the number of.

  "He is on a newspaper; I am on the committee."

• By virtue of; with the pledge of.

  "He affirmed or promised on his word, or on his honour."

• To the account or detriment of; denoting imprecation or invocation, or coming to, falling, or resting upon.

  "A curse on him!"

• (especially when numbers of combatants or competitors are specified) Against; in opposition to.

  "The fight was three on one, and he never stood a chance."