adverse event

noun

Any occurrence that has any negative (deleterious) influence (in any degree from mild to severe).

“adverse events in the control group”

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Meanings

nounadverse event (plural adverse events)

plural adverse events

  1. medicineAny occurrence that has any negative (deleterious) influence (in any degree from mild to severe).

    adverse events in the control group

    1 more example

    adverse events in the treatment group

Cite this entry
APA

adverse event. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/adverse%20event

MLA

“adverse event.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/adverse%20event. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “adverse event,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/adverse%20event.

Source: adverse event on Wiktionary, CC BY-SA 4.0.