Definition from Wiktionary, the free dictionary
- The transitional period of physical and psychological development between childhood and maturity.
- During adolescence, the body and mind go through many complex changes, some of which are difficult to deal with.
Related terms 
period between childhood and maturity
- adolescence in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
- adolescence in The Century Dictionary, The Century Co., New York, 1911
adolescence f (plural adolescences)