Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “backup”

backup

noun uk   /ˈbæk.ʌp/ us  
B2 [C or U] (someone or something that provides) support or help, or something that you have arranged in case your main plans, equipment, etc. go wrong: We're going to need some professional backup for this project. The party is going to be outdoors, so we'll need to organize somewhere as a backup in case it rains. Remember, your colleagues are your backup system when things go wrong. B2 [C] a copy of information held on a computer that is stored separately from the computer: Before we leave work each day, we make a backup of all the records we have entered into the computer that day. The department's backup disks are all stored in a different building. [C] US a player who plays when the person who usually plays is not available: He's a backup for the Dallas Cowboys.
(Definition of backup from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of backup?
Add Cambridge dictionaries to your browser to your website

More meanings of “backup”

Definitions of “backup” in other dictionaries

Word of the Day

for starters

used to say that something is the first in a list of things

Word of the Day

Countability – grammar codes

by Dom Glennon​​,
November 26, 2014
Advices and informations Have you ever noticed strange codes in square brackets on entries in Cambridge Dictionaries Online and wondered what they mean? These are grammar codes, giving you a brief summary of how that word behaves grammatically. More information can be obtained by hovering your cursor over the code, and there’s

Read More 

ped-text verb

November 24, 2014
to text someone while walking I’m ped-texting, I’m looking down at my phone, 75 percent of the time.

Read More