'Haystack' definitions:

Definition of 'haystack'

From: WordNet
noun
A stack of hay [syn: haystack, hayrick, rick]

Definition of 'Haystack'

From: GCIDE
  • Haystack \Hay"stack`\ (h[=a]"st[a^]k`), n. A stack or conical pile of hay in the open air. [1913 Webster]

Synonyms of 'haystack'

From: Moby Thesaurus