Meaning of “invade” - Learner’s Dictionary

invade

verb uk us /ɪnˈveɪd/
COUNTRY [ I, T ]

B2 to enter a country by force in order to take control of it:

Portugal was invaded by the French in 1807.
PLACE [ T ]

to enter a place in large numbers:

Every summer the town is invaded by tourists.
invade sb's privacy

to become involved in someone's private life when they do not want you to

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