stagger

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To move or stand unsteadily, as if under a great weight; totter. synonym: blunder.
• intransitive verb To cause to totter, sway, or reel.
• intransitive verb To astonish, shock, or overwhelm.
• intransitive verb To place on or as if on alternating sides of a center line; set in a zigzag row or rows.
• intransitive verb To arrange in alternating or overlapping time periods.
• intransitive verb To arrange (the wings of a biplane) so that the leading edge of one wing is either ahead of or behind the leading edge of the other wing.
• intransitive verb Sports To arrange (the start of a race) with the starting point in the outside lanes progressively closer to the finish line so as to neutralize the advantage of competing in the shorter inside lanes.
• noun A tottering, swaying, or reeling motion.
• noun A staggered pattern, arrangement, or order.
• noun Any of various diseases in animals, especially horses, cattle, or other domestic animals, that are characterized by a lack of coordination in moving, a staggering gait, and frequent falling.

from The Century Dictionary.

• To walk or stand unsteadily; reel; totter.
• To hesitate; begin to doubt or waver in purpose; falter; become less confident or determined; waver; vacillate.
• Synonyms Totter, etc. See reel.
• To cause to reel, totter, falter, or be unsteady; shake.
• To cause to hesitate, waver, or doubt; fill with doubts or misgivings; make less steady, determined, or confident.
• To arrange in a zigzag order; specifically, in wheel-making, to set (the spokes) in the hub alternately inside and outside (or more or less to one side of) a line drawn round the hub.
• noun A sudden tottering motion, swing, or reel of the body as if one were about to fall, as through tripping, giddiness, or intoxication.
• noun plural One of various forms of functional and organic disease of the brain and spinal cord in domesticated animals, especially horses and cattle: more fully called blind staggers.
• noun Hence plural A feeling of giddiness, reeling, or unsteadiness; a sensation which causes reeling.
• noun plural Perplexities; doubts; bewilderment; confusion.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To cause to reel or totter.
• transitive verb To cause to doubt and waver; to make to hesitate; to make less steady or confident; to shock.
• transitive verb 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.
• intransitive verb 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.
• intransitive verb To cease to stand firm; to begin to give way; to fail.
• intransitive verb To begin to doubt and waver in purpose; to become less confident or determined; to hesitate.
• noun 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.
• noun (Far.) A disease of horses and other animals, attended by reeling, unsteady gait or sudden falling
• noun rare Bewilderment; perplexity.
• noun (Far.) distention of the stomach with food or gas, resulting in indigestion, frequently in death.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun 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.
• noun A disease of horses and other animals, attended by reeling, unsteady gait or sudden falling; as, parasitic staggers; apoplectic or sleepy staggers.
• noun bewilderment; perplexity.
• verb sway unsteadily, reel, or totter
• verb doubt, waver, be shocked

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb walk as if unable to control one's movements
• noun an unsteady uneven gait
• verb to arrange in a systematic order
• verb astound or overwhelm, as with shock
• verb walk with great difficulty