(of a nation) to join an alliance; (of an athlete) to join a sports team; (of an entrepreneur) to join a franchise; (of an actor) to join the cast of a movie; (of a recording artist) to sign with a label
(used before a disyllabic verb, often after an adverb like 不bù, 大dà, 稍shāo etc, to indicate that the action applies to sth previously mentioned, as in 稍加改良shāojiāgǎiliáng "make some minor improvements to (it)")
2
盟
méng
oath
pledge
union
to ally
league, a subdivision corresponding to prefecture in Inner Mongolia