For the military definition of sloop see:
Sloop-of-war. For sailing in the eLearning sea see:
SLOOP Project. A sloop (From
Dutch sloep) in
sailing, is a vessel with a
fore-and-aft rig. A sloop carries a single
mast stepped farther forward than that of a
cutter. The sloop's fore-triangle is smaller than a cutter's. As such, the sloop usually bends only one headsail, though this distinction is not definitive. A cutter rig generally carries multiple headsails, however sloops such as the
Friendship Sloop carry more than one headsail and are properly designated a sloop and not a cutter. Ultimately position of the mast is the most important factor.
See more at Wikipedia.org...