Clipping of 第三インターナショナル (“Third International”).

(history, communism) Synonym of コミンテルン (Komiterun, “Comintern”); the Third International

(mathematics) equilateral triangle

Kyūjitai form of 三毛猫 (“calico cat”)

Kyūjitai form of 三畳紀 (“the Triassic period”)

the Three Character Classic, a Classical Chinese text / a Japanese text in a similar metre, also known as the 本朝三字経 (honchō sanjikyō)

third time's a charm

the most noble three branches of the Tokugawa clan (徳(とく)川(がわ)氏(し) (Tokugawa-shi)): 尾張(おわり) (Owari), 紀伊(きい) (Kī), and 水戸(みと) (Mito) / (figuratively) the "big three"

a male given name

choosing one of three options