Also found in: Thesaurus.
1. Having the eyes wide open, as in surprise.
2. Watchful and alert.
1. with the eyes wide open, as in amazement
2. watchful; alert
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|Adj.||1.||open-eyed - carefully observant or attentive; on the lookout for possible danger; "a policy of open-eyed awareness"; "the vigilant eye of the town watch"; "there was a watchful dignity in the room"; "a watchful parent with a toddler in tow"|