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90s Slang You Should Know


[uh-kliv-i-tee] /əˈklɪv ɪ ti/
noun, plural acclivities.
an upward slope, as of ground; an ascent (opposed to declivity).
Origin of acclivity
1605-15; < Latin acclīvitās, equivalent to acclīv(is) steep (ac- ac- + -clīvis, adj. derivative of clīvus slope) + -itās -ity
Related forms
acclivitous, acclivous
[uh-klahy-vuh s] /əˈklaɪ vəs/ (Show IPA),
unacclivitous, adjective
unacclivitously, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for acclivity


noun (pl) -ties
an upward slope, esp of the ground Compare declivity
Derived Forms
acclivitous, acclivous (əˈklaɪvəs) adjective
Word Origin
C17: from Latin acclīvitās, from acclīvis sloping up, steep
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for acclivity

1610s, from Latin acclivitatem (nominative acclivitas) "an ascending direction, an upward steepness," from acclivis "mounting upwards, ascending," from ad- "up" (see ad-) + clivus "hill, a slope," from PIE *klei-wo-, suffixed form of *klei- "to lean" (see lean (v.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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