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(lrt"), a.[F. alerte, earlier l'erte on the watch, fr. It. all' erta on the watch, prop. (standing) on a height, where one can look around; erta a declivity, steep, erto steep, p. p. of ergere, erigere, to erect, raise, L. erigere. See Erect.] 1. Watchful; vigilant; active in vigilance. 2. Brisk; nimble; moving with celerity. An alert young fellow. Addison. Syn. -- Active; agile; lively; quick; prompt. Alert" n.(Mil.) An alarm from a real or threatened attack; a sudden attack; also, a bugle sound to give warning. "We have had an alert." Farrow. On the alert, on the lookout or watch against attack or danger; ready to act. スポンサード リンク
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