Definition of “colonize” - Learner’s Dictionary

colonize

verb [ T ] also UK -ise us uk /ˈkɒlənaɪz/
SEND PEOPLE

to send people to live in and govern another country:

[ often passive ] Burundi was first colonized by the Germans.
LIVE/GROW

to start growing or living in large numbers in a place:

Weeds quickly colonize areas of cleared ground.
colonist noun [ C ] us uk /ˈkɒlənɪst/

someone who goes to colonize a country

colonization noun [ U ] us uk /ˌkɒlənaɪˈzeɪʃən/

(Definition of “colonize” from the Cambridge Learner's Dictionary © Cambridge University Press)