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English definition of “vigilant”

vigilant

adjective uk   /ˈvɪdʒ.ɪ.lənt/ us  
always being careful to notice things, especially possible danger: Following the bomb scare at the airport, the staff have been warned to be extra vigilant.Cautious and vigilantPaying attention and being careful
vigilantly
adverb uk   /-li/ us  
Cautious and vigilantPaying attention and being careful
(Definition of vigilant from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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