Definition of plain suit in English:

plain suit

Line breaks: plain suit

noun

(In bridge and whist) a suit that is not trumps.
More example sentences
  • For the sake of clarity, it is worth pointing out that where a lead of a plain suit has been trumped by the second player to a trick and the third to play also has no cards in the suit led, then the third player must still overtrump if possible.
  • If a plain suit lead has been trumped, it is illegal to undertrump unless by doing so one creates a K-Q or K-Q-J combination in the trick.
  • The suit of the lowest of these cards, in plain suit order, determines trumps.