U.S. Naut. [? f. STEEVE v.2 But cf. Sp. esteba of the same meaning.] A long derrick or spar, with a block at one end, used in stowing cargo. (Cent. Dict.)

1

1840.  R. H. Dana, Bef. Mast, xxix. Two long, sharp spars, called steeves … were placed with their wedge ends into the inside of the hide.

2