Thesaurus.com
Dictionary.com
Showing results for side effect.
Definitions

side effect

NOUN
adverse or unwanted secondary effect
Synonyms
STRONGEST
aftereffect reaction
WEAK
aftermath aftertaste by-product carry-over concomitant corollary leftover offshoot secondary response side issue sidebar spinoff

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But scientists are now raising concerns about an unexpected side effect.

From Science Daily • Apr. 18, 2026

The moves are a side effect of the war with Iran, which has spread across more of the Middle East, creating tighter supplies of oil and petroleum products such as jet fuel.

From The Wall Street Journal • Apr. 1, 2026

Some people may experience bloating, nausea or discomfort as a side effect.

From BBC • Mar. 31, 2026

A statement describes it as a side effect of reproductive tract disease, which she had a history of before arriving at the zoo and is common in aging female elephants.

From Los Angeles Times • Mar. 31, 2026

Call it a side effect of being struck by lightning.

From "The Miscalculations of Lightning Girl" by Stacy McAnulty