I. re ‧ join 1 /ˌrɪːˈdʒɔɪn/ BrE AmE verb [transitive]
to go back to a group of people, organization etc that you were with before:
She rejoined her friends in the lounge.
In 1938 he rejoined the Socialists.
II. re ‧ join 2 /rɪˈdʒɔɪn/ BrE AmE verb [transitive] literary
to say something in reply, especially rudely or angrily SYN retort :
‘I don’t care!’ she rejoined.