[ uh-fekt ]
/ əˈfɛkt /

verb (used with object)

verb (used without object)

Obsolete. to incline, tend, or favor (usually followed by to): He affects to the old ways.

Origin of affect

1400–50; late Middle English < Middle French affecter < Latin affectāre to strive after, feign (frequentative of afficere to do to), equivalent to af- af- + fec- (see affect1) + -tāre frequentative suffix


1 See pretend.


af·fect·er, noun

usage note for affect

See affect1. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for affecters (1 of 2)


verb (əˈfɛkt) (tr)

to act upon or influence, esp in an adverse waydamp affected the sparking plugs
to move or disturb emotionally or mentallyher death affected him greatly
(of pain, disease, etc) to attack

noun (ˈæfɛkt, əˈfɛkt)

psychol the emotion associated with an idea or set of ideasSee also affection

Word Origin for affect

C17: from Latin affectus, past participle of afficere to act upon, from ad- to + facere to do

British Dictionary definitions for affecters (2 of 2)

/ (əˈfɛkt) /

verb (mainly tr)

to put on an appearance or show of; make a pretence ofto affect ignorance
to imitate or assume, esp pretentiouslyto affect an accent
to have or use by preferenceshe always affects funereal clothing
to adopt the character, manner, etc, ofhe was always affecting the politician
(of plants or animals) to live or grow inpenguins affect an arctic climate
to incline naturally or habitually towardsfalling drops of liquid affect roundness

Word Origin for affect

C15: from Latin affectāre to strive after, pretend to have; related to afficere to affect 1
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

Medical definitions for affecters

[ ə-fĕkt ]


To have an influence on or affect a change in.
To attack or infect, as a disease.


Feeling or emotion, especially as manifested by facial expression or body language.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.