Meaning of “supporter” - Learner’s Dictionary

supporter

noun [ C ] us uk /səˈpɔːtər/
IDEA

B2 someone who supports a particular idea, group, or person:

a strong supporter of the government

More examples

SPORTS mainly UK

B1 someone who likes a particular sports team and wants them to win:

English football supporters

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