Mast·ed a. Furnished with a mast or masts; -- chiefly in composition; as, a three-masted schooner.
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Mast, v. t. [imp. & p. p. Masted; p. pr. & vb. n. Masting.] To furnish with a mast or masts; to put the masts of in position; as, to mast a ship.
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masted
adj : having or furnished with a mast; often used in combination;
"probably was so masted when she set forth"-
S.E.Morrison; "a three-masted bark"