on the lookout

on the lookout

1. Constantly alert, intent on finding something or someone.

   Synonym: on the outlook

   I'm on the lookout for a good example of a Roman dinar from the 1st century. Let me know if you hear of one anywhere.

   • 2020, Jess Ryder, The Night Away:

     In London, of all places, where people are always on the lookout for opportunities to commit crimes: an unzipped handbag, a phone sticking out of a back pocket, an unpadlocked bike.

• on the outlook