The quality or state of being young.
being in the first or an early stage of life, growth, or development
junior sense 1a
of an early, tender, or desirable age for use as food or drink
having little experience
recently come into being : new
youthful sense 5
of, relating to, or having the characteristics of youth or a young person
representing a new or rejuvenated especially political group or movement
young persons : youth
immature offspring
a single recently born or hatched animal