| 单词 | backup |
| 释义 | backup /bak"up'/, n. 1. a person or thing that supports or reinforces another. 2. a musician or singer or group of musicians or singers accompanying a soloist: a singer with a three-man backup that plays cello, bass, and guitar. 3. an overflow or accumulation due to stoppage, malfunctioning, etc.: a sewage backup; a backup of cars at the tollbooth. 4. a person, plan, device, etc., kept in reserve to serve as a substitute, if needed. 5. Computers. a. a copy or duplicate version, esp. of a file, program, or entire computer system, retained for use in the event that the original is in some way rendered unusable. b. a procedure to follow in such an event. 6. Bowling. a ball that curves in a direction corresponding to the bowling hand of the bowler. adj. 7. (of a person, plan, device, etc.) held in reserve as a substitute if needed: a backup driver; a backup generator. 8. performing a secondary or supporting function: A drummer and guitarist are the singer's backup musicians. [1775-85, Amer.; n. use of v. phrase back up] |
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