full-grown
adjective
[ fʊlˈɡrəʊn ]
• having reached maturity.
• "Alison still treats Trevor as though he wasn't a full-grown adult"
Similar:
adult,
mature,
grown-up,
of age,
having reached one's majority,
fully grown,
fully developed,
fully fledged,
in full bloom,
ripe,
in one's prime,
