from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A downward slope, as of a hill.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. the downward slope of a hill
- n. a downward bend in a path
from the GNU version of the Collaborative International Dictionary of English
- n. Deviation from a horizontal line; gradual descent of surface; inclination downward; slope; -- opposed to acclivity, or ascent; the same slope, considered as descending, being a declivity, which, considered as ascending, is an acclivity.
- n. A descending surface; a sloping place.
from The Century Dictionary and Cyclopedia
- n. A downward slope.
- n. In entomology, a part gently sloping away from the general plane of a surface.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a downward slope or bend
Latin dēclīvitās, from dēclīvis, sloping down : dē-, de- + clīvus, slope; see klei- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
1610s, from French déclivité, from Latin declivitatem/dēclīvitās, from dēclivis ("a sloping downward"), from de ("down") + clīvus ("a slope"), from Proto-Indo-European *ḱleywo-, from Proto-Indo-European *ḱley- (“to lean”) (English lean). (Wiktionary)