From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( v. i.) To move quickly by lifting the legs on the same side together, as a horse; to amble with rapidity; to rack.

(2): ( n.) A device in a loom, to maintain tension on the warp in pacing the web.

(3): ( v. t.) To develop, guide, or control the pace or paces of; to teach the pace; to break in.

(4): ( v. t.) To measure by steps or paces; as, to pace a piece of ground.

(5): ( v. t.) To walk over with measured tread; to move slowly over or upon; as, the guard paces his round.

(6): ( v. i.) To pass away; to die.

(7): ( n.) Specifically, a kind of fast amble; a rack.

(8): ( v. i.) To proceed; to pass on.

(9): ( v. i.) To go; to walk; specifically, to move with regular or measured steps.

(10): ( n.) A slow gait; a footpace.

(11): ( n.) Manner of stepping or moving; gait; walk; as, the walk, trot, canter, gallop, and amble are paces of the horse; a swaggering pace; a quick pace.

(12): ( n.) A broad step or platform; any part of a floor slightly raised above the rest, as around an altar, or at the upper end of a hall.

(13): ( n.) Any single movement, step, or procedure.

(14): ( n.) A single movement from one foot to the other in walking; a step.

(15): ( n.) The length of a step in walking or marching, reckoned from the heel of one foot to the heel of the other; - used as a unit in measuring distances; as, he advanced fifty paces.

Hastings' Dictionary of the Bible [2]

PACE. See Weights and Measures.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [3]

( צִעִד , Tsa'Ad, a Step, as elsewhere rendered), not a formal measure, but talent in a general sense ( 2 Samuel 6:13).

International Standard Bible Encyclopedia [4]

pās ( צעד , ca‛adh ): A step in   2 Samuel 6:13 , hence, about one yard.