n. The time of life between thirteen and nineteen years old.
n. The second decade of a century: the 1910s, 2010s, etc. The oneties, the tens.
the GNU version of the Collaborative International Dictionary of English
noun-plural. The years of one's age having the termination -teen, beginning with thirteen and ending with nineteen.
The Century Dictionary and Cyclopedia
The numbers whose names have the termination -teen; especially, the years of one's age included within these numbers.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the time of life between the ages of 12 and 20
n. all the numbers that end in -teen
Word Usage
"Reilly, who converted to Islam in his mid-teens, is thought to have met British-based Muslim radicals in Internet cafes near his council home in Plymouth, which he shared with his mother."