Adolescents also increase their peer focus and involvement in peer-related activities, place greater emphasis on social acceptance, and seek more independence and autonomy from parents. —adolescent adj., n. Adolescence is the phase of life between childhood and adulthood, from ages 10 to 19. It is a unique stage of human development and an important time for laying the foundations of good health. Adolescents experience rapid physical, cognitive and psychosocial growth. ADOLESCENT definition: 1. a young person who is developing into an adult 2. being or relating to an adolescent: 3. used…. Learn more. To begin with, you will learn about adolescence, its definition and the various changes during this period. The importance of adolescence has been dealt in describing adolescents as a special group and need to invest in them to promote healthy and productive individuals for the development of the nation. The unit progresses with a description of adolescent profile at global and national level. Throughout the unit you will undertake various learning activities and case studies to grasp the ...