If you do something on purpose, you do it intentionally, not by accident.

I didn't do it on purpose - it was an accident. 我不是故意这样做的，是个意外。

Sometimes I suspect she arrives late on purpose just to annoy me.

I'm convinced he knocked my drink over on purpose.

Some of these species were introduced to the area on purpose to keep the rodent population down.

Their coach instructed them to lose the game on purpose.

Synonyms: advisedly deliberatelyexpresslyintentionallypurposely