biblical seventh day (of creation, of the Jewish week) / the seventh day (of the month, week, year, etc.)

“third-category beer”, a beer-like alcoholic beverage that is not classified as either beer or happōshu in the Japanese tax code

synonym of 第三のビール (“third-category beer”)

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

(history, socialism, communism, anarchism) the First International

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

(history, socialism) the Second International

a Classical Japanese adjective with シク活用 (shiku-katsuyō, “shiku-inflection”)

a Classical Japanese adjective with ク活用 (ku-katsuyō, “ku-inflection”)

(Internet slang) A member of the online 2channel community.