from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. On the alert; watchful. See Synonyms at aware.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Watchful, especially for danger or disorder; alert; wary
from the GNU version of the Collaborative International Dictionary of English
- adj. Attentive to discover and avoid danger, or to provide for safety; wakeful; watchful; circumspect; wary.
from The Century Dictionary and Cyclopedia
- Watchful, as one who watches during the hours for sleep; ever awake and on the alert; attentive to discover and avoid danger, or to provide for safety; circumspect; cautious; wary.
- Indicating vigilance.
- Synonyms 1. Wakeful, etc. See watchful.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. carefully observant or attentive; on the lookout for possible danger
Middle English, from Old French, from Latin vigilāns, vigilant-, present participle of vigilāre, to be watchful; see vigilante.(American Heritage® Dictionary of the English Language, Fourth Edition)
From French vigilant or its source, Latin vigilans, present participle of vigilare ("stay awake"), from vigil ("awake"). (Wiktionary)