Meaning of “assemble” - Learner’s Dictionary

assemble

verb uk us /əˈsembl/
GROUP [ I, T ]

to join other people somewhere to make a group, or to bring people together into a group:

They assembled in the meeting room after lunch.
BUILD [ T ]

to build something by joining parts together

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