The Collaborative International Dictionary of English v.0.48:
Forestage \For"est*age\, n. [Cf. F. forestage.] (O. Eng. Law) (a) A duty or tribute payable to the king's foresters. (b) A service paid by foresters to the king. [1913 Webster]WordNet (r) 3.0 (2006):
forestage n 1: the part of a modern theater stage between the curtain and the orchestra (i.e., in front of the curtain) [syn: proscenium, apron, forestage]