DICT.TW Dictionary Taiwan

 Sloop n.
 1. Naut. A vessel having one mast and fore-and-aft rig, consisting of a boom-and-gaff mainsail, jibs, staysail, and gaff topsail. The typical sloop has a fixed bowsprit, topmast, and standing rigging, while those of a cutter are capable of being readily shifted.  The sloop usually carries a centerboard, and depends for stability upon breadth of beam rather than depth of keel.  The two types have rapidly approximated since 1880.  One radical distinction is that a sloop may carry a centerboard. See Cutter, and Illustration in Appendix.
 Sloop of war, formerly, a vessel of war rigged either as a ship, brig, or schooner, and mounting from ten to thirty-two guns; now, any war vessel larger than a gunboat, and carrying guns on one deck only.
 ◄ ►

 Cor·vet Cor·vette n.  Naut. A war vessel, ranking next below a frigate, and having usually only one tier of guns; -- called in the United States navy a sloop of war.
 ◄ ►

 sloop of war
      n : a sailing or steam warship having cannons on only one deck