1. adj. In the state of being active, functioning or operating.
2. adj. Performing according to schedule.
Are we still on for tonight?
Is the show still on?
3. adj. (chiefly UK, informal, usually negative) Acceptable, appropriate.
Example Sentences
It's the usual show put on by the government.
I need to put on a mask so no one can tell that this is me.
I got a pair of jeans you can put on if you want.
There have been many wars before this one, but I have never heard of a case of anyone being put on trial for having lost, except by their own people.
They put on cloaks and go out onto the roof.