Mount1  —v. 1 ascend; climb on to. 2 a get up on (a horse etc.) To ride it. B set on horseback. C (as mounted adj.) Serving on horseback (mounted police). 3 a (often foll. By up) accumulate. B (of a feeling) increase. 4 (often foll. By on, in) set (an object) on a support or in a backing, frame, etc., esp. For viewing. 5 organize, arrange, set in motion (a play, exhibition, attack, guard, etc.). 6 (of a male animal) get on to (a female) to copulate. —n. 1 backing, etc. On which a picture etc. Is set for display. 2 horse for riding. 3 setting for a gem etc. [latin: related to *mount2]