Meaning of viper

vi•per

Pronunciation: (vī'pur), [key]
— n.
  1. any of several venomous Old World snakes of the genus Vipera, esp. V. berus, a small snake common in northern Eurasia.
  2. any related snakes belonging to the family Viperidae, characterized by erectile, venom-conducting fangs.
  3. See
  4. any of various venomous or supposedly venomous snakes.
  5. a malignant or spiteful person.
  6. a false or treacherous person.
  7. (cap.)a 9-pound (4 kg), shoulder-launched, unguided U.S. Army antitank rocket with an effective range of 273 yds. (250 m).
  8. to befriend a person who proves to be treacherous.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also: