Noah Webster's Dictionary 1. (a.) Having arrived at maturity, or to full size and strength; matured; as, an adult person or plant; an adult ape; an adult age. 2. (n.) A person, animal, or plant grown to full size and strength; one who has reached maturity.

Multi-Version Concordance Adult (3 Occurrences) Matthew 14:21 Those who had eaten were about 5,000 adult men, without reckoning women and children. (WEY) John 6:10 "Make the people sit down," said Jesus. The ground was covered with thick grass; so they sat down, the adult men numbering about 5,000. (WEY) Acts 4:4 But many of those who had listened to their preaching believed; and the number of the adult men had now grown to be about 5,000. (WEY)