1. look out - Noun
2. look out - Verb
to protect someone's interests
be vigilant, be on the lookout or be careful
Source: WordNetlook-out
To look forward and not back, To look out and not in, and To lend a hand. Edward Everett Hale
We all live in a house on fire, no fire department to call; no way out, just the upstairs window to look out of while the fire burns the house down with us trapped, locked in it. Tennessee Williams
One has to look out for engineers-they begin with sewing machines and end up with the atomic bomb. Marcel Pagnol
Forget the past, but look out in the future. Afghan Proverb
Those who play bowls must look out for rubbers. Australian Aboriginal Proverb
If a girl seems as shy as a mouse, you still have to look out for the tiger within her. Chinese Proverb