Definition of "twelve-year-old" [twelve-year-old]

• Describing a person or thing having an age of twelve years (adjective)
• A person or thing having an age of twelve years (noun)

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• "The moment Ava’s name hit the Web, a flurry of results came back, most in French, some in English—to my chagrin, all referring to a twelve-year-old journalist."
• "One of them detailed an appalling crime in Okinawa in which three U.S. soldiers had kidnapped a twelve-year-old Japanese schoolgirl and raped her in a rented car."
• "In the space known as the undercroft, classrooms equipped with low plastic banquet tables and tiny chairs are littered with toys, crayons, and construction paper, as volunteer teachers prepare activities and lessons for their two- to twelve-year-old charges."