What does your dictionary give? The dictionaries that I checked were helpful.
Oxford Learners Dictionaries
BrE /ˈkʌpl/ ; NAmE /ˈkʌpl/
(North American English, informal)
used before plural nouns to mean ‘a small number of’ or ‘a few’
synonym a few
It's only a couple blocks away.
If you refer to a couple of people or things, you mean two or approximately two of them, although the exact number is not important or you are not sure of it.
Across the street from me there are a couple of police officers standing guard. [+ of]
I think the trouble will clear up in a couple of days. [+ of]
...a small town a couple of hundred miles from New York City. [+ of]
Couple is also a determiner in spoken American English, and before 'more' and 'less'.
...a couple weeks before the election.
I think I can play maybe for a couple more years.
Couple is also a pronoun.
I've got a couple that don't look too bad.