viper

noun vi·per \ ˈvī-pər \
Updated on: 24 Nov 2017

Definition of viper

1 a : a common Eurasian venomous snake (Vipera berus) that attains a length of about two feet (0.6 meter), varies in color from red, brown, or gray with dark markings to black, and is usually not fatal to humans; broadly : any of a family (Viperidae) of venomous snakes that includes Old World snakes (subfamily Viperinae) and the pit vipers
b : a venomous or reputedly venomous snake
2 : a vicious or treacherous person

Examples of viper in a Sentence

  1. a viper sliding silently through the field

Recent Examples of viper from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'viper.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of viper

Middle English vipere, from Latin vipera


VIPER Defined for English Language Learners

viper

noun

Definition of viper for English Language Learners

  • : a type of poisonous snake


VIPER Defined for Kids

viper

noun vi·per \ ˈvī-pər \

Definition of viper for Students

: a poisonous heavy-bodied snake with long hollow fangs

Medical Dictionary

viper

noun vi·per \ ˈvī-pər \

medical Definition of viper

1 : a common Eurasian venomous snake of the genus Vipera (V. berus) that attains a length of about two feet (0.6 meter), varies in color from red, brown, or gray with dark markings to black, and whose bite is usually not fatal to humans; broadly : any snake of an Old World subfamily (Viperinae) of the family Viperidae
2 : pit viper
3 : a venomous or reputedly venomous snake


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