n.
- One who has attained maturity or legal age.
- Biology. A fully grown, mature organism.
- Fully developed and mature.
- Relating to, intended for, or befitting adults: adult education.
- Containing or dealing in explicitly sexual material; pornographic: adult movies; adult bookstores.
[From Latin adultus, past participle of adolēscere, to grow up. See adolescent.]
adulthood a·dult'hood' n.adultness a·dult'ness n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.