look out

[look out] or [watch out] {v.} 1. To take care; be careful; be onguard. - Usually used as a command or warning.

"Look out!" Johncalled, as the car came toward me.

"Look out for the train," thesign at the railroad crossing warns.

2. To be alert or watchful; keepwatching.

A collector of antique cars asked Frank to look out for a1906 gas head lamp.

Compare: EYE OUT, ON THE WATCH. 3. {informal} Towatch or keep (a person or thing) and do what is needed; provideprotection and care. - Used with "for".

Lillian looked out for hersister's children one afternoon a week.

Uncle Fred looked out forhis brother's orphan son until the boy was through college.