Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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Spar a female member of the U.S. Coast Guard (acronym for "semper paratus", the Guard's motto).
spar1 a strong pole, esp. one that supports sails on a ship, such as the mast, boom, gaff, or yard. [3 definitions]
spar2 to make boxing movements without hitting hard, as for practice or in fun. [5 definitions]
spar3 any of a number of shiny or somewhat lustrous crystalline minerals (often used in combination).