1. standard for tv/video display which uses 625 scan lines per frame and twenty-five frames per second (popular in Europe and Australia). chum, buddy, an affectionate term for a friend. make friends with, mingle with, fraternize, chum. palpalace palace , n. [oe. palais, f. palais, fr. l. palatium, fr. palatium, one of the seven hills of rome, which augustus had his residence. cf. paladin.]