Youth is the period between childhood and adulthood, described as the period of physical and psychological development from the onset of puberty to maturity and early adulthood. Definitions of the specific age range that constitutes youth vary. An individual's actual maturity may not correspond to their chronological age, as immature individuals exist at all ages.UsageAround the world the terms "youth", "adolescent", "teenager", and "young person" are interchanged, often meaning the sam