keep a weather eye open

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keep a weather eye open (third-person singular simple present keeps a weather eye open, present participle keeping a weather eye open, simple past and past participle kept a weather eye open)

1. (intransitive, idiomatic) to maintain a background awareness of something; to remain alert to changes without it occupying one's full attention.
   • For quotations using this term, see Citations:keep a weather eye open.

• keep half an eye on something
• keep one's wits about one

• ear to the ground