sentinel
/ˈsɛn.tɪ.nəl/ noun, verb, proper noun
Forms sentinels sentineling sentinelling sentineled sentinelled centinel
- noun A sentry, watch, or guard.
- noun (obsolete) A private soldier.
- noun (computer science) A unique value recognised by a computer program for processing in a special way, or marking the end of a set of data. “The <xmp> tag is a sentinel that suspends web-page processing and displays the subsequent text literally”
- noun A sentinel crab.
- noun (attributive, medicine, epidemiology) A sign of a health risk (e.g. a disease, an adverse effect). “sentinel animals can be used to explore endemic diseases.”
- verb (transitive) To watch over as a guard. “He sentineled the north wall.”
- verb (transitive) To post a guard for. “He sentineled the north wall with just one man.”
- proper noun An unincorporated community in Maricopa County, Arizona.
- proper noun A ghost town in Fresno County, California.
- proper noun An unincorporated community in Polk County, Missouri.
- proper noun A town in Washita County, Oklahoma.
Synonyms
Etymology
First attested in the 1570s from Middle French sentinelle (“watch or guard kept by a soldier”), from Old Italian sentinella, probably from sentina + -ella, from sentire (“perceive, watch, hear”), from sentiō (“feel, perceive by the senses”). See also sense, sentient.
Webster’s 1913
- noun One who watches or guards; specifically (Mil.), a soldier set to guard an army, camp, or other place, from surprise, to observe the approach of danger, and give notice of it; a sentry.
- noun Watch; guard. [Obs.] "That princes do keep due sentinel." Bacon.
- verb To watch over like a sentinel. "To sentinel enchanted land." [R.]
- verb To furnish with a sentinel; to place under the guard of a sentinel or sentinels.
Etymology [F. sentinelle (cf. It. sentinella); probably originally, a litle path, the sentinel's beat,, and a dim. of a word meaning, path; cf. F. sente path. L. semita; and OF. sentine, sentele, senteret, diminutive words. Cf. Sentry.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “sentinel”, CC BY-SA 4.0. Details