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Definition of propensity - 3 dictionary results

pro⋅pen⋅si⋅ty

[pruh-pen-si-tee]
–noun, plural -ties.
1. a natural inclination or tendency: a propensity to drink too much.
2. Obsolete. favorable disposition or partiality.

Origin:
1560–70; propense + -ity


1. bent, leaning, disposition, penchant, proclivity.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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pro·pen·si·ty   (prə-pěn'sĭ-tē)   
n.   pl. pro·pen·si·ties
An innate inclination; a tendency. See Synonyms at predilection.

[From propense, inclined, from Latin prōpēnsus, past participle of prōpendēre, to be inclined; see propend.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

propensity 
1570, "disposition to favor," from obsolete adj. propense "inclined, prone" (1528), from L. propendere "incline to, hang forward, weigh over," from pro- "forward" + pendere "hang" (see pendant).
Online Etymology Dictionary, © 2001 Douglas Harper
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