watch it! Definition

watch
verb watches, watched, watching

tr & intr
1. To look at or focus one's attention on someone or something that is moving or doing something, etc.

Thesaurus: observe, see, take notice, view, pay attention, concentrate, attend.
tr & intr
2. To pass time looking at or observing (TV, a programme, entertainment or sports event, etc).
3. To keep track of, follow or monitor (developments, progress, etc).
4. To keep (eg a building or person) under observation or surveillance.

Thesaurus: guard, keep an eye on, patrol, police.
intr
5. To keep vigil; to remain awake or on the alert.
6a. To await one's chance; to be on the alert to take advantage of (an opportunity);

Form: watch for something (also)
6b. To look out for or guard against it.

Form: watch for something (also)
7. To keep checking on something, in case controlling measures or adjustments are necessary.
8. To pay proper attention to something

Example: watch where you're going!

noun watches

1. A small timepiece, usually worn strapped to the wrist (also called a wristwatch) or on a chain in the waistcoat pocket or attached to clothing.
2. The activity or duty of watching or guarding.

Thesaurus: lookout, surveillance, guard, patrol, vigil, observation; vigilance, alertness, watchfulness.
3. A wake; a vigil kept beside a corpse.
4a. naut.
Any of the four-hour shifts during which particular crew members are on duty;
4b. naut.
Those on duty in any such shift.
5. old use
A body of sentries on look-out duty; a watchman or body of watchmen.
6. historical
A division of the night, especially one of fixed time.

Idiom: keep a watch on something or someone

To keep it or them under observation.

Idiom: on the watch for something

Seeking or looking out for it.

Idiom: watch it!

Be careful!

Idiom: watch oneself

colloq
To take care in one's behaviour or actions.

Idiom: watch one's step

To step or advance with care.

colloq
To act cautiously or warily; to take care not to arouse suspicion or cause offence, etc.

Etymology: Anglo-Saxon wæccan or wacian to watch.

Phrasal Verb: watch out

To be careful.

Phrasal Verb: watch out for something or someone

To be on one's guard against it or them; to look out for them.

Phrasal Verb: watch over someone or something

To guard, look after or tend to them or it.