Dictionary

To switch on

Example: Can you on the light?

In the state of being active, functioning or operating.

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

Performing according to schedule; taking place.

Example: Are we still on for tonight?

Fitted; covering; being worn.

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

(usually negative) Acceptable, appropriate.

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

To an operating state.

Example: turn the television on

So as to cover or be fitted.

Example: Put on your hat and gloves.

Along, forwards (continuing an action).

Example: drive on, rock on

In continuation, at length.

Example: He rambled on and on.

Positioned at the upper surface of, touching from above.

Example: A vase of flowers stood on the table.

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

Example: He had a scar on the side of his face.

Expressing figurative placement or attachment.

Example: 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.

Example: to play on a violin or piano

Without.

In the Japanese language, a pronunciation, or reading, of a kanji character that was originally based on the character's pronunciation in Chinese, contrasted with kun.

Example: Most kanji have two kinds of reading, called "on" and "kun".