Try Our Apps


The Best Internet Slang


[af-ter-i-fekt, ahf-] /ˈæf tər ɪˌfɛkt, ˈɑf-/
a delayed effect; an effect that follows at some interval after the stimulus that produces it.
Medicine/Medical. a result appearing after the first effect due to an agent, usually a drug, has gone.
Origin of aftereffect
First recorded in 1810-20; after + effect Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for after-effect
Contemporary Examples
Historical Examples
  • Little she knew him, or guessed the after-effect of her words.

    Olive Dinah Maria Craik, (AKA Dinah Maria Mulock)
  • The after-effect of light is modified by the duration of exposure to light.

  • The after-effect at the maximum is a recovery to the normal equilibrium.

  • It was the after-effect of his long and difficult river experience.

    Carmen Ariza Charles Francis Stocking
  • Most of us, perhaps, have felt this after-effect of dreaming on our waking thoughts.

    Illusions James Sully
  • The same is true of the after-effect of the stimulus of light.

  • There was no suggestion of an after-effect of the slight concussion of the brain which had rendered him insensible.

    The Velvet Glove Henry Seton Merriman
  • The news seemed to stun both men at first, but the after-effect on each was wonderfully different.

    Red Rooney R.M. Ballantyne
  • The after-effect of intense cold is seen in the condition of inexcitability persisting for a very long period in the morning.

    Life Movements in Plants Sir Jagadis Chunder Bose
British Dictionary definitions for after-effect


any result occurring some time after its cause
(med) any delayed response to a stimulus or agent Compare side effect
(psychol) any illusory sensation caused by a stimulus that has ceased
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
Cite This Source

Word of the Day

Difficulty index for aftereffect

Few English speakers likely know this word

Word Value for after

Scrabble Words With Friends

Nearby words for after-effect