'Bay State' definitions:

Definition of 'Bay State'

(from WordNet)
noun
A state in New England; one of the original 13 colonies [syn: Massachusetts, Bay State, Old Colony, MA]

Definition of 'Bay State'

From: GCIDE
  • Bay State \Bay State\ Massachusetts, which had been called the Colony of Massachusetts Bay; -- a nickname. [Webster 1913 Suppl.]