| 单词 | sentinel |
| 释义 | sentinel —sentinellike, adj. —sentinelship, n. /sen"tn l/, n. , v. , sentineled, sentineling or (esp. Brit.) sentinelled, sentinelling. n. 1. a person or thing that watches or stands as if watching. 2. a soldier stationed as a guard to challenge all comers and prevent a surprise attack: to stand sentinel. 3. Also called tag. Computers. a symbol, mark, or other labeling device indicating the beginning or end of a unit of information. v.t. 4. to watch over or guard as a sentinel. [1570-80; < MF sentinelle < It sentinella, deriv. of OIt sentina vigilance (L sent(ire) to observe) + -ina -INE2)] Syn. 1, 2. sentry, guard, watch, lookout. |
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