Meaning
Watchful, especially for danger or disorder; alert; wary.
Etymology
Origin: Old English
From French vigilant or its source, Latin vigilans, present participle of vigilare (“stay awake”), from vigil (“awake”). Doublet of vigilante, from Spanish. Displaced Old English wacor.
Synonyms & Antonyms
Antonyms
complacentheedlessobliviousunalertunawareunpreparedunwaryunwitting
NYT Puzzle Appearances
Accepted in 2 recorded puzzles, including a pangram: