on
onpreposition
UK/ɒn/US/ɑːn/
SURFACE
A1touching or supported by the top or side of something
- Your keys are on the table.
- There's a big map on the wall.
DAY
A1used to show the day or date when something happens
- I'll see you on Monday.
- She was born on 3 May.
ABOUT
A2about a particular subject
- I'm reading a book on Vietnamese history.
- Have you got any advice on writing a CV?
DEVICE
A2used to show the device or service through which something is seen, heard or used
- What's on TV tonight?
- He was on the phone for an hour.
TRANSPORT
A2used to show that someone is travelling in a bus, train, plane or ship
- I met her on the train.
- There were only ten people on the bus.
onadverb
UK/ɒn/US/ɑːn/
WORKING
A2if a machine or light is on, it is working or ready to use
- Is the heating on?
- You left the lights on all night.
CLOTHES
A2being worn
- Put your coat on, it's cold outside.
- She had a red dress on.
CONTINUING
B1continuing to do something, or moving forward
- Keep on walking until you reach the bridge.
- We drove on through the night.
HAPPENING
B1if an event is on, it is happening or planned
- Is the party still on for Saturday?
- What's on at the cinema this week?