be on
To be working, showing, or taking place right now.
Meanings
Of an event, performance, or programme: to be taking place or currently showing.
"There's a great jazz concert on at the theatre tonight — shall we go?"
Of a machine, appliance, or supply: to be switched on or functioning.
"Is the central heating on? It feels cold in here."
(British, informal) Of a person: to be behaving strangely, acting unusually, or under the influence of drugs.
"What is he on? He's been talking nonsense for the past hour."
Of a scheduled activity or plan: to be agreed upon and still going ahead.
"Is our meeting still on for Thursday, or do we need to reschedule?"
Has multiple everyday senses. 'What's on?' is a very common British expression meaning 'what's happening?' or 'what's showing at the cinema/theatre?' The sense meaning a person is acting strangely is British informal.
Commonly used with
Forms
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