The Collaborative International Dictionary of English v.0.48:
Gemara \Ge*ma"ra\, n. [Heb.] (Jewish Law) The second part of the Talmud, or the commentary on the Mishna (which forms the first part or text). [1913 Webster]WordNet (r) 3.0 (2006):
Gemara n 1: the second part of the Talmud consisting primarily of commentary on the Mishna