Peep v. i. [imp. & p. p. Peeped p. pr. & vb. n. Peeping.]
 1. To cry, as a chicken hatching or newly hatched; to chirp; to cheep.
    There was none that moved the wing, or opened the mouth, or peeped.   --Is. x. 14.
 2. To begin to appear; to look forth from concealment; to make the first appearance; as, the sun peeped over the eastern hills.
    When flowers first peeped, and trees did blossoms bear.   --Dryden.
 3. To look cautiously or slyly; to peer, as through a crevice; to pry.
    Peep through the blanket of the dark.   --Shak.
    From her cabined loophole peep.   --Milton.
 Peep sight, an adjustable piece, pierced with a small hole to peep through in aiming, attached to a rifle or other firearm near the breech.