A15K

Eighteen

UK /["/ˌeɪˈtiːn/"]/US /["/ˌeɪˈtiːn/"]/

Definition

18

In simple words: The number after seventeen.

Examples

  • He turned eighteen last week.
  • Eighteen is the age of majority in many countries.
  • You need to be at least eighteen to vote.
  • She scored eighteen points in the basketball game.
  • There are eighteen students in the class.

Usage notes

Used in everyday conversation as well as in formal contexts, typically with numbers. Less common in written form but still appropriate in lists and numerical data.

Grammar pattern

standalone number

Memory hint

Think of 'eight' and 'teen' together, like a teen turning 18.

Collocations

  • eighteen years old
  • eighteen points
  • eighteen members
  • eighteen days
  • eighteen dollars

Synonyms

  • 18
  • one more than seventeen
  • two less than twenty
  • a decade and eight

Antonyms

  • zero
  • one
  • seventeen
  • nineteen

Common mistakes

  • Confuse with 'eighteen' and 'eighty'
  • Incorrect pronunciation, especially emphasizing the 'teen' part
  • Mistaking the spelling, often writing 'eighteen' as 'eighteen'