Adulthood refers to the stage of life when a person is considered to be a grown-up or mature. It is the phase where individuals are responsible for themselves and make important decisions independently. Full definition
Puppy food is specifically formulated with nutrition for dogs that are still growing into adulthood in mind. (thedrakecenter.com)
The same keeps happening in adulthood in various ways; and for a blogger that is in more the case. (modlychic.com)
I find that science interest measured in young adulthood earlier explains more than a third (36 %) of the variable's cumulative effect on trust in climate scientists. (culturalcognition.net)