watch

1 watch /ˈwɑːtʃ/ verb
watches; watched; watching
1 watch
/ˈwɑːtʃ/
verb
watches; watched; watching
Britannica Dictionary definition of WATCH
1 
a  : to look at (someone or something) for an amount of time and pay attention to what is happening
[+ object]
[no object]
b  : to give your attention to (a situation, an event, etc.)
[+ object]
[no object]
2 
[+ object] : to care for (someone or something) for a period of time in order to make sure that nothing bad or unwanted happens
3 
[+ object]
a  : to try to control (something)
b  : to be careful about (something) — usually used in commands
4 
not used in progressive tenses, [+ object] : to make sure that something bad or unwanted does not happen
— often used in commands

a watched pot never boils

— see 1boil

watch for

[phrasal verb]
1 
watch for (someone or something) : to look for (someone or something that you expect to see)
2 
watch for (something) : to look for (something that you want to get or use)

watch it

informal
— used to tell someone to be careful

watch out

[phrasal verb]
: to be aware of something dangerous
— often + for

watch over

[phrasal verb]
watch over (someone or something)
: to take care of (someone or something)

watch (someone or something) like a hawk

— see 1hawk

watch someone's back

— see 1back

watch your back

— see 1back

watch your p's and q's

— see 1p

watch your step

— see 1step

you watch

informal
— used to tell someone that you think something will probably happen
2 watch /ˈwɑːtʃ/ noun
plural watches
2 watch
/ˈwɑːtʃ/
noun
plural watches
Britannica Dictionary definition of WATCH
1 
[count] : a device that shows what time it is and that you wear on your wrist or carry in a pocket — compare clock; see also stopwatch, wristwatch
2 
a  : the act of giving your attention to someone or something especially in order to make sure that nothing bad or unwanted happens
[singular]
— usually + on or over
[noncount]
b  [singular] : the act of looking for someone or something that you expect to see : the act of regularly checking to see if someone has arrived or if something has appeared or happened
— see also whale watch
3 
a  : a period of time when a person or group is responsible for guarding or protecting someone or something
[count]
— usually singular
[noncount]
b  [count] : a group of people who guard or protect someone or something for a period of time — usually singular
— see also neighborhood watch
c  [count] : the period of time during which someone is in charge of something — usually singular
4 
[count] US : a quick announcement from an official source which tells people that severe weather conditions could occur very soon — usually singular