A symbol in musical notation used to separate two sections or phrases of music.

plural of double-edged sword

(astronomy) a binary star

(logic) The statement that the negation of the negation of A implies A, for any proposition A. Stated symbolically: ¬¬A→A.

(bodybuilding) A standard pose in which both sets of biceps and the abdominals are flexed, while one is facing the judges.

(bodybuilding) A standard pose in which both sets of biceps and back muscles are flexed, with one's back turned toward the judges.

(bodybuilding) A standard pose in which both sets of biceps and back muscles are flexed, with one's back turned toward the judges.

plural of double star system

(colloquial) Intensified form of dare.

(colloquial) An intensified form of a dare, frequently used after the dared person initially refuses.