What is "minor suit"

n. (context bridge English) Either of the suits of diamonds (♦) and clubs (♣), which rank lower than the major suits (spades and hearts).

n. ( bridge) a suit of inferior scoring value, either diamonds or clubs

In contract bridge the minor suits are diamonds and clubs . They are given that name because contracts made in those suits score less (20 per contracted trick) than contracts made in the major suits (30 per contracted trick), and they rank lower in bidding. In particular, one can make game with a four-level bid in a major suit, while a five-level bid is required in a minor. Of the two minor suits, diamonds rank higher than clubs.