Ma'anar ƙamus na "katin wasa" shine kati da ake amfani da shi wajen yin wasanni daban-daban, yawanci yana ɗauke da zane a fuskarsa da matsayi daga ɗaya zuwa goma da jack, sarauniya, sarki, da ace a cikin kowane guda hudu. Kwat ɗin guda huɗu yawanci zukata ne, lu'u-lu'u, kulake, da spades. Ana iya yin katunan wasa daga abubuwa daban-daban kamar takarda, filastik, ko ma ƙarfe. Ana amfani da su a wasanni daban-daban kamar poker, gada, blackjack, da dai sauransu.