Definition of "spar" [spar]

• Nautical A wooden or metal pole, such as a boom, yard, or bowsprit, used to support sails and rigging. (noun)
• A usually metal pole used as part of a crane or derrick. (noun)
• A main structural member in an airplane wing or a tail assembly that runs from tip to tip or from root to tip. (noun)
• To supply with spars. (verb-transitive)
• Archaic To fasten with a bolt. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The term spar is a generic term used by geologists to refer to any non-metallic mineral with a glassy (vitreous) luster that breaks on distinct flat surfaces (planes)."
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