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on

preposition

/ɒn/

Meaning

physically in contact with and supported by a surface

The book is on the table.

on time

upon, atop, over, above

off, away

on the table, on the way, on purpose, on duty

used for expressing motion or direction

used to indicate a specific time, place, or direction

moving to a position on the surface of something

expressing the relationship between a part and a whole

against (in a competition or conflict)

inside the limits of something, or as part of a particular space or time