Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “backed up”

backed up

adjective [after verb]     /ˌbæktˈʌp/
If traffic is backed up, the vehicles have to wait in a long line because there are too many of them: The traffic is backed up for six miles on the road to the coast .
(Definition of backed up adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of backed up

Word of the Day

tie the knot

to get married

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