Peak \Peak\, v. i. [imp. & p. p. Peaked; 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 sicky. ``Dwindle, peak, and pine.'' --Shak.

3. [Cf. Peek.]

To pry; to peep slyly. --Shak.

Peak arch (Arch.), a pointed or Gothic arch.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Peaked \Peaked\, a.

1. Pointed; ending in a point; as, a peaked roof.

2. (Oftener ?) Sickly; not robust. [Colloq.]

Source: Webster's Revised Unabridged Dictionary (1913)