from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Being in the process of passing out of use or usefulness; becoming obsolete.
- adj. Biology Gradually disappearing; imperfectly or only slightly developed. Used of an organ or other part of an animal or plant.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. In the process of becoming obsolete, but not obsolete yet.
from the GNU version of the Collaborative International Dictionary of English
- adj. Going out of use; becoming obsolete; passing into desuetude.
from The Century Dictionary and Cyclopedia
- Becoming obsolete; passing out of use: as, an obsolescent word or custom.
- In entomology, somewhat obsolete; imperfectly visible.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. becoming obsolete
Latin obsolēscēns, obsolēscent-, present participle of obsolēscere, to fall into disuse : ob-, away; see ob- + solēre, to be accustomed to.(American Heritage® Dictionary of the English Language, Fourth Edition)
First attested circa 1780, from Latin obsolescentum. (Wiktionary)