What does aftereffect mean?
An aftereffect is a consequence that lingers or emerges after the event, action, or condition that produced it has ended. The word is most at home in medical and psychological writing — one speaks of the aftereffects of anesthesia, head injury, or traumatic experience — but it applies equally well to broader situations, such as the economic aftereffects of a recession or the political aftereffects of a scandal. Unlike 'aftermath,' which describes the general state of affairs following a major event, an aftereffect points to a specific residual result, often one that arrives late or persists longer than expected. The term carries a slightly clinical, formal register, and it is almost always paired with 'of' to identify its cause: 'the aftereffects of the stroke.' Because so many experiences — from illness to disaster — leave traces that outlast their causes, 'aftereffect' gives writers a precise, widely understood way to name those enduring consequences.
nounAn aftereffect is a delayed or lingering result of an event, experience, or action, especially one that continues to be felt after the immediate cause has passed.
- A delayed or lingering physical, psychological, or practical consequence that continues to be felt after the event or action that caused it.
"Months after the flood receded, the town was still dealing with the aftereffects on its economy."
"She still experienced dizzy spells as an aftereffect of the medication."
"The economic aftereffects of the war were felt for decades."
The plural is common because events often produce multiple lingering consequences; it is standard in medical and journalistic writing.
"The survivors reported a range of aftereffects, including insomnia and anxiety."
The word 'aftereffect' literally stacks 'after' onto 'effect' — English's way of saying some consequences refuse to stay in the past.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of aftereffect
The word 'aftereffect' is formed transparently within English by combining the native adverb/preposition 'after' with the noun 'effect.' The noun 'effect' itself derives from Latin 'effectus' ('accomplishment, result'), from the verb 'efficere' ('to bring about'), built on the root 'facere' ('to do, make'). This same Latin root underlies related words such as 'affect,' 'affection,' 'effective,' and 'infection.' Compound formations like this became common in English from roughly the early modern period onward, and 'aftereffect' follows the pattern of other 'after-' compounds such as 'aftermath' and 'aftershock.'
Related word forms
How aftereffect is actually used
Common in medical and psychological contexts (e.g., aftereffects of illness, injury, or trauma), but also used more broadly for any delayed consequence. Usually used with 'of' to specify the cause. The plural 'aftereffects' is frequent when multiple lingering results are meant.
Easily confused with aftereffect
Aftermath refers to the overall situation or period following a significant event, while aftereffect refers to a specific lingering or delayed consequence of it.
A side effect is an unintended secondary result, typically of a drug or treatment, whereas an aftereffect is any consequence that persists or appears after the primary event.