Definition of Nubile

Adjective: nubile n(y)oo-bil or 'n(y)oo,bI(-u)l [N. Amer], 'n(y)oo,bI(-u)l [Brit]

Of girls or women who are eligible to marry
"In France the year of majority is twenty-one, and the nubile age eighteen";
- marriageable