Other forms: sloops
A sailboat with one mast is known as a sloop. In general, sloops are known as speedy boats that are relatively simple to rig with sails.
If you spot a sailboat with a single mast and two sails, it's almost certainly a sloop. Sloops come in many sizes, from small dinghies to 100-foot sailboats. What they have in common is the way they're rigged, or how their sails and masts are organized. A sloop's rigging is usually "fore and aft," with one sail in front of the mast and one behind it. The word sloop comes from the Middle Dutch slupen, "to glide."