Definition of spar

• n. - An old name for a nonmetallic mineral, usually cleavable and somewhat lustrous; as, calc spar, or calcite, fluor spar, etc. It was especially used in the case of the gangue minerals of a metalliferous vein.
• v. t. - A general term any round piece of timber used as a mast, yard, boom, or gaff.
• v. t. - Formerly, a piece of timber, in a general sense; -- still applied locally to rafters.
• v. t. - The bar of a gate or door.
• v. t. - To bolt; to bar.
• v. t. - To To supply or equip with spars, as a vessel.
• v. i. - To strike with the feet or spurs, as cocks do.
• v. i. - To use the fists and arms scientifically in attack or defense; to contend or combat with the fists, as for exercise or amusement; to box.
• v. i. - To contest in words; to wrangle.
• n. - A contest at sparring or boxing.
• n. - A movement of offense or defense in boxing.