Definition of backup noun from the Oxford Advanced American Dictionary

     

    backup

     noun
    noun
    NAmE//ˈbækʌp//
     
     
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  1. 1[uncountable, countable] extra help or support that you can get if necessary The police had backup from the army. We can use him as a backup if one of the other players drops out. a backup power supply
  2. 2(computing) [countable] a copy of a file, etc. that can be used if the original is lost or damaged Always make a backup of your work. a backup copy see also back up
  3. 3 [countable] a situation in which something is not moving or flowing freely, usually because something is blocking it a traffic backup a toilet backup Topic CollocationsDrivinghaving a car have/own a car ride a motorcycle/moped/scooter drive/use/prefer an automatic/a manual/a stick shift have/get your car fixed/repaired/looked at buy/sell a used car take/pass/fail a driver's test/road test/knowledge test get/obtain/have/lose/carry a/your driver's license/learner's permitdriving put on/fasten/buckle/wear/undo your seat belt put/turn/leave the key in the ignition start the car/engine change/shift gears shift/put the car into gear/neutral/drive/park press/put your foot on the brake pedal/clutch/accelerator release the clutch/the emergency brake/the parking brake drive/park/reverse the car signal that you are turning left/right take/miss the turn apply/hit/slam on the brake(s) beep/honk your hornproblems and accidents a car skids/crashes (into something)/collides (with something) swerve to avoid an oncoming car/a pedestrian crash/lose control of the car have/be in/be killed in/survive a (car) crash/a (car) wreck/an accident/a hit-and-run be run over/hit by a car/bus/truck dent/hit the hood/trunk/door/side panel/bumper/fender break/crack/shatter the windshield blow/puncture a tire get/have a flat tire inflate/change/replace/check a tiretraffic and driving regulations be caught in/get stuck in/sit in a traffic jam cause congestion/traffic jams/gridlock/backups experience/face lengthy delays beat/avoid the traffic/the rush hour exceed/observe/drive the speed limit be caught by a speed camera stop somebody for/pull somebody over for speeding (informal) run a red light/the lights be arrested for/charged with drunk driving/driving under the influence (DUI)/driving while intoxicated (DWI) be banned from driving have your license suspended/taken away/ (informal) pulled
  4. 4 [uncountable] (especially in pop music) music that accompanies the main singer or tune They sang backup for Elvis Presley. backup vocals
See the Oxford Advanced Learner's Dictionary entry: backup

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