Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “on”


preposition (CONNECTED)    /ɒn/ US  /ɑːn/
A1 covering the surface of, being held by, or connected to something: You've got blood on your shirt . Which finger do you wear your ring on? Can you stand on your head ? We could hang this picture on the wall next to the door . Dogs should be kept on their leads at all times .UK We've just moved house and we're not on the phone (= not connected to the phone service ) yet .On or off Grammar:At, on and in (place)We use at:Grammar:On, ontoOn and onto are prepositions.
(Definition of on preposition (CONNECTED) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of on

Definitions of “on” in other dictionaries

Word of the Day

grand prix

one of a series of important international races for very fast and powerful cars

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More