younger (Adjective) — Used of the younger of two persons of the same name especially used to distinguish a son from his father.
younger (Adjective) — (used of living things especially persons) in an early period of life, development or growth. ex. "young people"
younger (Adjective) — (of crops) harvested at an early stage of development; before complete maturity. ex. "young corn"
younger (Adjective) — Suggestive of youth; vigorous and fresh. ex. "he is young for his age"
younger (Adjective) — Being in its early stage. ex. "a young industry" ex. "the day is still young"
younger (Adjective) — Not tried or tested by experience. ex. "a young hand at ploughing"