watch out

phrasal verb·1 sense·particle out

Meanings

1

Be careful or alert to danger

Why “out”? Something comes into the open. People can see it, know it, or understand it.

Watch out for ice on the road.
Be alert for ice on the road.
Watch out for bikes on this path.
Be alert for bikes on this path.

Don't confuse with

watch outwatch on

Watch out means be careful or alert to danger. Watch on means observe an event from the sidelines without participating.

Test yourself

Watch out for ice on the road. What does it mean?

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