Noun

1. An unsteady movement of the body in walking or standing, as if one were about to fall; a reeling motion; vertigo; -- often in the plural; as, the stagger of a drunken man.
2. A disease of horses and other animals, attended by reeling, unsteady gait or sudden falling; as, parasitic staggers; apoplectic or sleepy staggers.
3. Bewilderment; perplexity.

Verb

1. To move to one side and the other, as if about to fall, in standing or walking; not to stand or walk with steadiness; to sway; to reel or totter.
2. To cease to stand firm; to begin to give way; to fail.
3. To begin to doubt and waver in purposes; to become less confident or determined; to hesitate.
4. To cause to reel or totter.
5. To cause to doubt and waver; to make to hesitate; to make less steady or confident; to shock.
6. To arrange (a series of parts) on each side of a median line alternately, as the spokes of a wheel or the rivets of a boiler seam.
7. To walk in an awkward, drunken fashion