Ăc'me, n.

n. [N. Lat. acme, Gr. ἀκμή, point, edge, top.] 1. The top or highest point; the summit. The very acme and pitch of life for epic poetry. Pope. The moment when a certain power reaches the acme of its supremacy. I. Taylor.

2. (Med.) The crisis of a disease, or its utmost violence. Dunglison.
3. People of mature years. [Obs. and rare.]

He must be one that can instruct your youth, And keep your acme in the state of truth. B. Jonson.