Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “back sth up”

See all translations

back sth up

phrasal verb with back
 
 
/bæk/ verb
PROVE to prove that something is true: [often passive] His claims are backed up by recent research.Backing, supporting and defendingDefending and protecting
COMPUTER B2 to make an extra copy of computer informationComputer concepts
(Definition of back sth up phrasal verb, verb from the Cambridge Learners Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

Definitions of “back sth up” in other dictionaries

Word of the Day

nation

a country, especially when thought of as a large group of people living in one area with their own government, language, traditions, etc.

Word of the Day

Think long and hard; the language of decisions

by Liz Walter,
January 28, 2015
One of the best ways (perhaps the best way) to improve your English is to learn how words go together in phrases, idioms, or other patterns such as verb/noun or adjective/noun pairs (often called ‘collocations’). This blog looks at some useful phrases and collocations connected with the subject of decisions, something we

Read More 

micro pig noun

January 26, 2015
an extremely small pig, bred to be a pet Micro pigs have become popular pets recently, with famous owners including Victoria Beckham, Paris Hilton and Olympic diver, Tom Daley.

Read More