From WordNet (r) 3.0 (2006) :
spar n 1: any of various nonmetallic minerals (calcite or feldspar) that are light in color and transparent or translucent and cleavable 2: a stout rounded pole of wood or metal used to support rigging 3: making the motions of attack and defense with the fists and arms; a part of training for a boxer [syn: spar, sparring] v 1: furnish with spars 2: fight with spurs; "the gamecocks were sparring" 3: box lightly 4: fight verbally; "They were sparring all night"