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on
/ɒn/
in a position of contact with a surface
She placed the book on the table.
The book is now in contact with the table's surface.
general
in a position of contact with a surface
The lamp is on the desk.
The lamp is touching the desk's surface.
This is the most common physical meaning of 'on'.
general
in operation or functioning
The TV is on.
The television is currently operating.
Used for electronic devices and systems.
general
in a state of being covered or wearing something
He put on his jacket.
He is now wearing his jacket.
Often used with clothing or accessories.
general
in a state of being focused or concentrated
She's on a diet.
She is currently following a diet plan.
Used for temporary states or activities.
informal
in a state of being addicted or dependent
He's on drugs.
He is currently using drugs regularly.
Informal usage, often implying addiction.
general
in a state of being scheduled or planned
The meeting is on for tomorrow.
The meeting is scheduled to happen tomorrow.
Used for events or activities that are confirmed.
general
in a state of being in progress or happening
The game is on.
The game is currently being played.
Used for events or activities that are currently occurring.
Collocations
on the phoneusing a phone to talkon the wayin the process of travelingon timepunctual or at the scheduled timeon purposeintentionally or deliberatelyon saleavailable for purchase at a reduced price
Related Phrases
Pro Tip
Physical Contact
Use 'on' to describe something touching a surface, like 'The cat is on the couch.'
Operation
Use 'on' to describe something that is functioning, like 'The lights are on.'
Coverage
Use 'on' to describe something covering or wearing something, like 'She put on her glasses.'
Focus
Use 'on' to describe concentration or attention, like 'He's focused on his work.'
Scheduling
Use 'on' to describe something that is planned or scheduled, like 'The meeting is on for tomorrow.'
Gold Rule
Context Matters
The meaning of 'on' depends heavily on the context. Pay attention to the surrounding words to determine the correct interpretation.
Common Phrases
Many common phrases use 'on', such as 'on the phone', 'on the way', and 'on time'. Learn these phrases to improve your fluency.
Word Origin
Old English 'on', from Proto-Germanic '*ana', meaning 'on, upon'. Related to Old Norse 'á', Old Frisian 'ana', and Old Saxon 'ana'.
Usage Notes
'On' is a highly versatile preposition with many meanings depending on context. It can indicate physical contact, operation, coverage, focus, or scheduling. The meaning is usually clear from the context in which it is used.
English Dictionary