adder

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈædər/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/ˈædɚ/ ,USA pronunciation: respelling(adər)


WordReference Random House Learner's Dictionary of American English © 2026
ad•der1 /ˈædɚ/USA pronunciation   n. [countable]
  1. Reptilesthe common European viper.
  2. Reptilesa snake resembling the viper.

WordReference Random House Unabridged Dictionary of American English © 2026
ad•der1  (adər),USA pronunciation n. 
  1. Reptilesthe common European viper, Vipera berus.
  2. Reptilesany of various other venomous or harmless snakes resembling the viper.
  • bef. 950; late Middle English; replacing Middle English nadder (a nadder becoming an adder by misdivision; compare apron), Old English næddre; cognate with Old Saxon nādra, Old High German nātara (German Natter), Old Norse nathra snake, Gothic nadrs adder, Old Irish nathir snake, Latin natrix water snake

add•er2  (adər),USA pronunciation n. 
  1. a person or thing that adds.
  • add + -er1 1570–80

Collins Concise English Dictionary © HarperCollins Publishers::
adder /ˈædə/ n
  1. Also called: viper a common viper, Vipera berus, that is widely distributed in Europe, including Britain, and Asia and is typically dark greyish in colour with a black zigzag pattern along the back
  2. any of various similar venomous or nonvenomous snakes

See also death adder, puff adderEtymology: Old English nǣdre snake; in Middle English a naddre was mistaken for an addre; related to Old Norse nathr, Gothic nadrs
'adder' also found in these entries (note: many are not synonyms or translations):

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