backup
- 01 B1 Intermediate
n.a copy of a file or information stored separately in case the original is lost or broken.
n.a duplicate of data or software stored on an independent medium to facilitate recovery after a primary system failure.
Simple“You should always make a backup of your photos on an external hard drive.”
In context“The system administrator scheduled a full backup for midnight to ensure that no critical data would be lost during the server migration.”
UsageOften used with the verb 'make' or 'run'.
- 02 B1 Intermediate
n.a person or thing that is ready to help or take over if the main one fails.
n.a reserve, substitute, or auxiliary resource maintained for use in the event of a primary failure or shortage.
Simple“We have a second generator as a backup in case the power goes out.”
In context“The manager kept a list of freelance consultants to serve as a backup during the peak holiday season when permanent staff were at capacity.”
SynonymsAntonyms - 03 B2 Upper Intermediate
n.extra people, like police officers or soldiers, who are sent to help someone in a difficult situation.
n.additional personnel or equipment sent to reinforce or support an individual or unit in the field.
Simple“The officer called for backup when he realized the crowd was getting angry.”
In context“The tactical unit waited for aerial backup before proceeding with the high-risk extraction mission.”
Synonyms - 04 B2 Upper Intermediate
n.a long line of cars or a blockage in a pipe that stops things from moving.
n.an accumulation or overflow caused by a physical obstruction or a volume of flow exceeding capacity.
Simple“There is a huge traffic backup on the highway because of the construction.”
In context“A severe sewage backup in the basement forced the residents to evacuate the building for several days while repairs were conducted.”
Synonyms - 05 B2 Upper Intermediate
n.the music or singing that supports the main performer.
n.vocal or instrumental accompaniment that supports a lead performer.
Simple“She started her career singing backup for a famous rock star.”
In context“The singer insisted on hiring a professional gospel choir to provide backup for the final track of the album.”
SynonymsAntonyms - 06 B1 Intermediate
adj.describing something kept as an extra in case it is needed.
adj.functioning as a reserve or auxiliary; intended for use only if the primary option is unavailable.
Simple“I always carry a backup battery for my phone when I travel.”
In context“The hospital relies on a backup power system to maintain life-support machines during local electrical grid failures.”
UsageAlways placed before the noun.
“Then, make sure you have backups of that information in your emergency go-bag , ideally in a waterproof baggie or container to protect them.”
“This winter, he and his wife switched it off and went back to their gas boiler, which they had kept as a backup.”
Deverbal from back up.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.