Definition of backup
1a : one that serves as a substitute or support I brought an extra pencil for backup. a backup planb : musical accompaniment The tunes include banjo and guitar backup.c : additional personnel who provide assistance The police officer called for backup.
2 : an accumulation caused by a stoppage in the flow traffic backup
3 : a copy of computer data (such as a file or the contents of a hard drive) I made a backup copy of the file.; also : the act or an instance of making a backup
Examples of backup in a Sentence
His role on the team is to be a backup to the regular quarterback.
We have an extra radio as a backup in case this one doesn't work.
We have an extra radio for backup.
He provides backup for the regular quarterback.
She sang backup on his CD.
Recent Examples of backup from the Web
Or Gibson can come off the bench and give the backups a steady presence.
Computer backups are free, and your computer’s hard drive has far more storage capacity than your phone.
Under Mayor Karen Weaver’s plan, the city of Flint would stay with the Detroit water system and use the local county as a backup.
Walder totaled four tackles playing for the White team, made up of backup defenders, in the spring game.
Mitchell, traditionally an off-guard, even played some point guard as U of L battled through injuries to starting frontman Quentin Snider and backup Tony Hicks.
Roem says Marshall has done little to help ease backups along Route 28, a main thoroughfare that feeds into newer residential developments and strip malls in Manassas and Bristow, focusing instead on his conservative social agenda.
Indiana-American officials said the plant would be idled and used as a backup.
Mr. Trump himself remained uncharacteristically silent, while his advisers kept the daily briefing off camera and sent out the backup to Sean Spicer, the press secretary.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'backup'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of backup
BACKUP Defined for English Language Learners
Definition of backup for English Language Learners
: a person or thing that can be used to replace or support another person or thing
: help or support provided by additional people or things
: a situation in which the flow of something (such as traffic) becomes blocked
BACKUP Defined for Kids
Definition of backup for Students
: a person who takes the place of or supports another The guard called for a backup.
Seen and Heard
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