early 17th cent. (in the sense fusion): from medieval Latin coalitio(n-), from the verb coalescere(see coalesce). Usage in politics dates from the late 18th cent
英英释义行业释义网络释义
noun
1.an organization of people (or countries) involved in a pact or treaty
2.the state of being combined into one body
3.the union of diverse things into one body or form or group; the growing together of parts