Game with tiles
(Other definitions for mah-jong that I've seen before include "Game of Chinese origin played with tiles" , "Game played with pieces called tiles" , "Chinese game with winds?" , "Chinese tile game" .)
(Other definitions for mahjong that I've seen before include "Chinese table game" , "Chinese tile game" , "Chinese game using tiles" , "Game played with pieces called tiles" , "Chinese game with 144 tiles" .)