The Collaborative International Dictionary of English v.0.48:
Hayfield \Hay"field`\ (h[=a]"f[=e]ld`), n. A field where grass for hay has been cut; a meadow. --Cowper. [1913 Webster]WordNet (r) 3.0 (2006):
hayfield n 1: a field where grass or alfalfa are grown to be made into hay [syn: hayfield, meadow]