major suit
Noun
Meaning
(bridge) a suit of superior scoring value, either spades or hearts
Source: WordNetSynonyms
Hypernyms
Examples
A notrump bidder who has at least four cards in each major suit normally responds in hearts, as this can still allow a spade fit to be found.
If the notrump bidder has four cards in each major suit, the notrump bidder corrects to the previously unbid major suit.
In either case, a responder who rebids notrump over a response in a major suit promises four cards of the other major suit.
In one, more common, referred to as non-forcing Stayman, in the sequence: :1NT 2 ♣ ; 2 ♦ 2 ♠ responder's simple rebid of a major suit is only invitational, showing 8-9 points and a 5-card spade suit.
If opener rebids a major suit you have found a 4-4 fit and ability to trump club losers (or, alternately, to sluff the other major on club winners and then to trump losers in the other major).
It is used to "check back" if opener has major suit support, saying nothing additional about the club suit.