noun
1. lacking and evidencing lack of experience of life
• Syn: ↑callowness, ↑jejuneness
• Derivationally related forms: ↑juvenile, ↑jejune (for: ↑jejuneness)
• Hypernyms: ↑immaturity, ↑immatureness
2. the freshness and vitality characteristic of a young person
• Syn: ↑youth, ↑youthfulness
• Derivationally related forms: ↑juvenile, ↑youthful (for: ↑youthfulness)
• Hypernyms: ↑youngness
Useful english dictionary. 2012.