keep an eye open Rate this phrase:(5.00 / 1 vote)
To maintain vigilance for someone or something.

Additional definitions for 'keep an eye open':

keep an eye openTo maintain vigilance for a possibly dangerous situation.
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"keep an eye open." Phrases.net. STANDS4 LLC, 2018. Web. 19 Oct. 2018. <https://www.phrases.net/phrase/keep-an-eye-open_4846>.

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