on

a  : touching and being supported by the top surface of (something)

b  : to a position that is supported by (something)

c  — used to indicate the part or object by which someone or something is supported

— used to say that something is attached to something

— used to indicate where someone or something is hit or touched

a  — used to indicate the surface or part where something is seen or located

b  — used to say that something (such as jewelry) is being worn by someone

: near or close to (something or someone)

— used to indicate the location or position of something or someone

— used to indicate the time when something happened or will happen

: immediately after (something)

— used to indicate the subject of something

a  — used to indicate the device or instrument that is used to do something

b  — used to say that someone is using a telephone, computer, etc.

c  — used to describe the device, system, etc., that is used for seeing something, hearing something, etc.

— used to indicate a source of something (such as money, food, information, or energy)

— used to indicate the vehicle or animal by which someone or something is moved from one place to another

— used to say that you have something in your possession at a particular time

— used to indicate the state of something

— used to indicate an activity that someone did or is now doing

— used to indicate something (such as a medicine or drug) that a person or animal is using

— used to indicate the person or thing that is responsible for something

a  — used to indicate the person or thing that something is directed toward

b  — used to say that someone has been affected by something

— used after an adjective to indicate the thing that a statement relates to

: as stated or shown by (someone or something)

— used to indicate that someone or something is included as part of a team, list, etc.

— used to say that someone or something has an advantage

chiefly US — used to say that someone is playing or performing well

a  — used to indicate that something is attached to, covering, or supported by something else

b  — used to describe something that is being worn by someone

— used to indicate movement forward

a  — used to indicate that an activity, event, or condition continues

b  : in an advanced state

c  : at a more advanced time : at a later time

: from one person or thing to another

a  — used to indicate that something is operating, flowing, etc.

b  — used to indicate that something is being heated, prepared, etc.

: in or into a train, bus, etc.

not used before a noun : attached to or covering something

not used before a noun : performing or speaking in public

not used before a noun : working at a job

a  not used before a noun : operating or flowing

b  : in a position that starts the flow of electricity, water, etc.

a  : taking place or happening

b  : doing something as planned

not used before a noun : being broadcast on television or radio

not used before a noun, chiefly US — used to say that you are able to do something well at a particular time