Peak, v. i. [imp. & p. p.Peaked (pēkt); p. pr. & vb. n.Peaking.] 1. To rise or extend into a peak or point; to form, or appear as, a peak.
There peaketh up a mighty high mount. Holand.
2. To acquire sharpness of figure or features; hence, to look thin or sickly. “Dwindle, peak, and pine.” Shak.
3. [Cf. Peek.] To pry; to peep slyly. Shak.
Peak arch(Arch.), a pointed or Gothic arch.