Wordnet 3.0
NOUN (1)
1.
(Judaism) an ancient commentary on part of the Hebrew scriptures that is based on Jewish methods of interpretation and attached to the biblical text;
The Collaborative International Dictionary of English v.0.48:
Midrash \Mid*rash"\, n.; pl. Midrashim, Midrashoth. [Heb.,
explanation.]
A talmudic exposition of the Hebrew law, or of some part of
it.
[1913 Webster]
WordNet (r) 3.0 (2006):
Midrash
n 1: (Judaism) an ancient commentary on part of the Hebrew
scriptures that is based on Jewish methods of
interpretation and attached to the biblical text