| Noun | 1. | adulthood - the period of time in your life after your physical growth has stopped and you are fully developedtime of life - a period of time during which a person is normally in a particular life state teens - the time of life between the ages of 12 and 20 mid-twenties, twenties - the time of life between 20 and 30 forties, mid-forties - the time of life between 40 and 50 mid-fifties, fifties - the time of life between 50 and 60 prime of life, prime - the time of maturity when power and vigor are greatest drinking age - the age at which is legal for a person to buy alcoholic beverages voting age - the age at which a person is old enough to vote in public elections middle age - the time of life between youth and old age (e.g., between 40 and 60 years of age) |
| 2. | adulthood - the state (and responsibilities) of a person who has attained maturitymatureness, maturity - state of being mature; full development manhood - the state of being a man; manly qualities parentage, parenthood - the state of being a parent; "to everyone's surprise, parenthood reformed the man" muliebrity, womanhood - the state of being an adult woman |