'major suit' definitions:

Definition of 'major suit'

(from WordNet)
noun
(bridge) a suit of superior scoring value, either spades or hearts

Definition of 'major suit'

From: GCIDE
  • major suit \major suit\ n. (Bridge) A suit of playing cards which has higher scoring value; specifically, either spades or hearts. Contrasted with a minor suit, being either diamonds or clubs. [WordNet 1.5 +PJC]