num
eighteen
AY-teen
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1
The number 18, one more than seventeen.
"You have to be eighteen to vote in most countries."
"She turned eighteen last week."
How to Use Eighteen
Learner’s notesIn plain EnglishThe number after seventeen — also the common legal age of adulthood in many countries.
Common pairings
turn eighteen
eighteen years old
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You have to be _____ to vote in most countries.