af·​ter·​ef·​fect | \ ˈaf-tər-ə-ˌfekt How to pronounce aftereffect (audio) \

Definition of aftereffect

: an effect that follows its cause after an interval

Examples of aftereffect in a Sentence

in the U.S. slavery was abolished in 1865, but its aftereffects remained keenly felt long afterwards
Recent Examples on the Web In the USA the Federal Reserve has dampened the economic risks associated with the Trump presidency, whilst the aftereffect of this (high inflation) has dampened the approval ratings of President Biden. Mike O'sullivan, Forbes, 11 June 2022 Helsinki recognizes her haunted look as the aftereffect of her first kill. Tara Ariano, Vulture, 7 Sep. 2021 But an aftereffect of this countrywide segregation was the birth of several African-American resorts that provided safe havens full of community and leisure. Morgan Jerkins, Harper's BAZAAR, 17 Aug. 2021 The most common aftereffect nationally is pain at the site of the injection, reported by 68% of Americans who have received the first dose of the COVID-19 vaccine, according to data collected by the CDC via its v-safe smartphone app. Sean P. Means, The Salt Lake Tribune, 19 Mar. 2021 On a camping trip to several state parks in Southwest Virginia this week, Gov. Ralph Northam received yet another reminder of the strange aftereffect of his bout with covid-19 last fall. Washington Post, 14 May 2021 Arm soreness was the most common first-dose aftereffect listed by readers who responded to a request from The Salt Lake Tribune to describe their vaccine experience, which reflects national statistics for the side effects from the COVID-19 vaccines. Sean P. Means, The Salt Lake Tribune, 19 Mar. 2021 Although the incident wasn’t technically an avalanche, its aftereffect certainly looked like one. New York Times, 22 Jan. 2021 One complicating factor is the aftereffect of this week’s powerful offshore winds. Nora Mishanec,, 29 Oct. 2020 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'aftereffect.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of aftereffect

1656, in the meaning defined above

History and Etymology for aftereffect

after- + effect entry 1

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Time Traveler for aftereffect

Time Traveler

The first known use of aftereffect was in 1656

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Dictionary Entries Near aftereffect

after-dinner cup



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Cite this Entry

“Aftereffect.” Dictionary, Merriam-Webster, Accessed 18 Aug. 2022.

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More Definitions for aftereffect


af·​ter·​ef·​fect | \ ˈaf-tər-ə-ˌfekt How to pronounce aftereffect (audio) \

Kids Definition of aftereffect

: an effect that follows its cause after some time has passed A bad headache is the only aftereffect of my accident.


af·​ter·​ef·​fect | \ ˈaf-tə-ri-ˌfekt How to pronounce aftereffect (audio) \

Medical Definition of aftereffect

1 : an effect that follows its cause after an interval the aftereffects of surgery
2 : a secondary result especially in the action of a drug coming on after the subsidence of the first effect

More from Merriam-Webster on aftereffect

Nglish: Translation of aftereffect for Spanish Speakers Encyclopedia article about aftereffect


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