Meaning of “good” - Learner’s Dictionary

good

adjective uk us /ɡʊd/ (better, best)
PLEASANT

A1 enjoyable, pleasant, or interesting:

a good book
Did you have a good time at the party?
HIGH QUALITY

A1 of a high quality or level:

She speaks good French.
The food at this restaurant is very good.
SUCCESSFUL

A1 successful, or able to do something well:

Anne's a good cook.
She's very good at geography.
KIND

A1 kind or helpful:

a good friend
My granddaughter is very good to me.
HEALTHY

A1 something that you say when a person asks how you are:

'Hi, how are you?' 'I'm good, thanks.'
POSITIVE

A1 having a positive or useful effect:

Exercise is good for you.
SUITABLE

A2 suitable or satisfactory:

When would be a good time to call?
BEHAVIOUR

A2 A good child or animal behaves well.

MORALLY RIGHT

B1 morally right:

a good person
He sets a good example to the rest of the class.
COMPLETE

complete and detailed:

She got a good look at the robbers.
LARGE

B2 used to emphasize the number, amount, quality, etc of something:

There's a good chance he'll pass the exam.
SATISFACTION

A1 something you say when you are satisfied or pleased about something or when you agree with something:

Oh good, he's arrived at last.
Good God/grief/heavens!, etc

used to express surprise or shock:

Good heavens! It's already 11 p.m.
a good 20 minutes/30 miles, etc

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