The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of various large stinging wasps of the family Vespidae, chiefly of the genera Vespa and Vespula, that characteristically build large papery nests.
n. A large wasp, of the genus Vespa, with a brown and yellow striped body and capable of inflicting a serious sting.
the GNU version of the Collaborative International Dictionary of English
n. A large, strong wasp. The European species (Vespa crabro) is of a dark brown and yellow color. It is very pugnacious, and its sting is very severe. Its nest is constructed of a paperlike material, and the layers of comb are hung together by columns. The American white-faced hornet (Vespa maculata) is larger and has similar habits.
The Century Dictionary and Cyclopedia
n. An insect of the wasp family, of the genus Vespa, much larger and stronger than wasps of other species, and capable of inflicting a more severe and painful sting.
n. Figuratively, a person who annoys by frequent and persistent petty attacks.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. large stinging paper wasp
Word Usage
"The American general in charge of NATO today declared the coalition forces in Afghanistan, have stirred up what he called a hornet's nest."