Spar, v. t. [OE. sparren, AS. sparrian; akin to G. sperren, Icel. sperra; from the noun. √171. See Spara beam, bar.] 1. To bolt; to bar. Chaucer.
2. To To supply or equip with spars, as a vessel.
☞ A vessel equipped with spars that are too large or too small is said to be oversparred or undersparred.