1again; once more; re-
2further; beyond this point of time
3(before an adjective) more
4then (after sth, and not until then)
5no matter how ... (followed by an adjective or verb, and then (usually) 也[ye3] or 都[dou1] for emphasis)
6(used to introduce additional information, as in 再則|再则[zai4 ze2], 再就是[zai4 jiu4 shi4] etc)
7(literary) to reappear; to reoccur