To watch over and protect someone, or to be alert so you can help them.
You make sure someone is safe and help them if something bad happens.
2 meanings, ordered from most common to least. Color-coded by CEFR level.
To watch over and protect someone, making sure they are safe and well.
"Promise me you'll look out for your little brother while I'm away."
You've got to look out for each other out there.
— Common phrase in military and sports contexts; widely cited in interview transcripts and film dialogue
To be alert on someone's behalf so you can spot opportunities or dangers for them.
"I'll look out for any job openings that might suit you."
Warm and caring in tone. Also used reflexively: 'look out for yourself.' Common in everyday speech in both British and American English.
Natural word combinations native speakers use most often.
The five tense forms you'll use most often.
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