Definition of "eighteens" [eighteens]

• Plural form of eighteen. (noun)

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• "These winners will be chosen from a shortlist of up to ten entries in each category up to five entries for under fourteens and up to five entries for fourteens to eighteens."
• "Snake oil clinics are okay, but only for the over-eighteens."
• "Any bets on the percentage of over-eighteens who wind up being counseled, as opposed to the under-eighteens?"