eighteen

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˌeɪˈtiːn/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/ˈeɪˈtin/ ,USA pronunciation: respellingtēn)


WordReference Random House Learner's Dictionary of American English © 2026
eight•een /ˈeɪˈtin/USA pronunciation   n. [countable]
  1. a number, ten plus eight.
  2. a symbol for this number, as 18 or XVIII.
eight•eenth, adj. 

WordReference Random House Unabridged Dictionary of American English © 2026
eight•een  tēn),USA pronunciation n. 
  1. a cardinal number, ten plus eight.
  2. a symbol for this number, as 18 or XVIII.
  3. a set of this many persons or things.

adj. 
  1. amounting to 18 in number.
  • bef. 1000; Middle English ehtetene, Old English eahtatēne; cognate with Old Norse āttjān, German achtzehn. See eight, -teen

Collins Concise English Dictionary © HarperCollins Publishers::
eighteen /ˈeɪˈtiːn/ n
  1. the cardinal number that is the sum of ten and eight and the product of two and nine See also number
  2. a numeral, 18, XVIII, etc, representing this number
  3. the amount or quantity that is eight more than ten
  4. something represented by, representing, or consisting of 18 units
determiner
    • amounting to eighteen: eighteen weeks
    • (as pronoun): eighteen of them knew
Etymology: Old English eahtatēne; related to Old Norse attjan, Old High German ahtozehan
'eighteen' also found in these entries (note: many are not synonyms or translations):

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