Meaning of “need” - Learner’s Dictionary

need

verb [ T ] uk us /niːd/
NECESSARY

A1 If you need something, you must have it, and if you need to do something, you must do it:

I need some new shoes.
The country still desperately needs help.
[ + to do sth ] The doctor said I might need to have an operation.
[ + to do sth ] If there's anything else you need to know, just give me a call.
We need you to look after the children for us.
don't need to do sth/ needn't do sth

A2 used in order to say that someone does not have to do something or should not do something:

You didn't need to come all this way.
You don't need to be frightened.
She needn't have taken him to the hospital.
NECESSARY ACTION

B1 If something needs something to be done to it, that thing should be done in order to improve it:

Do the clothes on this chair need washing?
The car needs to be serviced.
There needs to be sth

used to say that something is necessary:

There needs to be more funding for education in this country.

(Definition of “need verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)