serve

1 serve /ˈsɚv/ verb
serves; served; serving
1 serve
/ˈsɚv/
verb
serves; served; serving
Britannica Dictionary definition of SERVE
1 
a  [+ object] : to give (food or drink) to someone at a meal, in a restaurant, etc.
— see also serve up (below)
b  : to give food or drink to (someone)
[+ object]
[no object]
2 
[+ object] : to be enough food for (a particular number of people)
3 
[+ object] : to provide service to (a customer) : to help (a customer) make purchases
4 
[no object]
a  : to be used or seen in a particular way — + as
b  : to have a particular result or effect — often + as
— often followed by to + verb
5 
a  [+ object] : to be useful or helpful to (someone)
b  : to provide what is needed by or for (someone or something)
[+ object]
[no object]
— see also self-serving
c  [+ object] : to provide (an area or group of people) with a particular service
6 
: to hold a particular office, position, etc. : to perform a duty or job
[no object]
[+ object]
7 
[+ object] : to be in prison for or during (a period of time)
8 
[+ object] law : to send or give (someone) official legal papers
9 
[+ object] : to give respect and service to (someone or something)
10 
sports : to throw a ball into the air and hit it over a net to start play in tennis, volleyball, etc.
[no object]
[+ object]

first come, first served

— see 2first

serve out

[phrasal verb]
serve (something) out or serve out (something)
: to complete (a term in office, a prison sentence, etc.)

serve (someone) right

— used to say that someone who has behaved badly deserves a particular punishment, problem, etc.

serve two masters

: to give equal support to two different causes, groups, etc.

serve up

[phrasal verb]
serve up (something) or serve (something) up
: to give (food) to someone at a meal, in a restaurant, etc.
— sometimes used figuratively
2 serve /ˈsɚv/ noun
plural serves
2 serve
/ˈsɚv/
noun
plural serves
Britannica Dictionary definition of SERVE
[count] sports
: the act or action of throwing a ball into the air and hitting it over a net to start play in tennis, volleyball, etc.