40 よんじゅう Also written しじゅう, よそ, 四十, 四〇, 四拾, 卌 Meanings Number forty; 40 Words containing 40 40年代 (よんじゅうねんだい) the '40s 40代 (よんじゅうだい) (one's) 40s Jinuma: Japanese Dictionary · Word lists