a young person approaching the teens or adolescence.
a range of even-numbered garment sizes, chiefly from 6 to 14, designed for girls under 13.
of, relating to, or designed for subteens: subteen clothes.
Origin of subteen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
US and Canadian rare a young person who has not yet become a teenager
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012