Meaning of “masculine” - Learner’s Dictionary

masculine

adjective uk us /ˈmæskjəlɪn/
MEN

having qualities that are typical of men:

a masculine appearance/voice
GRAMMAR

in some languages, belonging to a group of nouns or adjectives that have the same grammatical behaviour. The other groups are 'feminine' and 'neuter'.

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