side effect

variants also side reaction
Definition of side effectnext

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of side effect Taking calcium supplements could exacerbate this side effect. Jennifer Lefton, Verywell Health, 3 Sep. 2026 This painful side effect, which can cause tingling and numbness in the hands and feet, can be managed with ice and painkillers or opioids. Jackie Flynn Mogensen, Scientific American, 3 Sep. 2026 However, Mulvihill notes that this is rarely a side effect of putting out bird food. Blythe Copeland, Martha Stewart, 2 Sep. 2026 Imagine two people reading the same headline about a rare side effect from a new vaccine. Aleeza Gerstein, The Conversation, 28 Aug. 2026 See All Example Sentences for side effect
Recent Examples of Synonyms for side effect
Noun
  • Initial demand was stratospheric because audiences were desperate to find out the ramifications of Spider-Man’s fateful choice.
    Rebecca Rubin, Variety, 16 Sep. 2026
  • Calls for a slowdown in the pace of AI development have hit related stocks in recent days and could have broad ramifications for every industry involved.
    Diana Olick, CNBC, 15 Sep. 2026
Noun
  • Nor has Erica’s return to duty silenced the aftereffects of her time with the Gorn.
    Keith Phipps, Vulture, 3 Sep. 2026
  • The story of a woman who’s still dealing with the aftereffects of that [abuse] isn’t told as much as a woman who’s currently in an abusive relationship and trying to get out.
    CT Jones, Rolling Stone, 2 Sep. 2026
Noun
  • The same goes for the guys, who reveal new layers of complexity in the movie’s later scenes that deepen our perception of them without betraying or undercutting the ugliness that has come before.
    Jim Hemphill, IndieWire, 17 Sep. 2026
  • But that was wartime—and the cessation of hostilities generated new complexities.
    Scott W. Stern, The Atlantic, 17 Sep. 2026
Noun
  • Because of this, the resulting code tends to exhibit redundancy and convolution and to lack a unified engineering standard.
    Ihor Hamal, Forbes.com, 18 Aug. 2026
  • In their alternating waves of resentment and understanding, anger and sorrow, D’Arcy and Cooke imbue Rhaenyra and Alicent’s dynamic with all the weight of this history and none of its convolutions.
    Alison Herman, Variety, 15 June 2026
Noun
  • Parsing symptoms of common bugs Figuring out whether your child has COVID-19, the flu, RSV or the common cold is important because some of these illnesses can cause serious complications in certain children.
    Ann Sheehan, The Conversation, 18 Sep. 2026
  • Around 30% of people who contract measles develop complications, with nine percent of those infected in 2025 and 2026 requiring hospitalization.
    Sheldon H. Jacobson, Chicago Tribune, 18 Sep. 2026

Browse Nearby Words

Cite this Entry

“Side effect.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/side%20effect. Accessed 20 Sep. 2026.

More from Merriam-Webster on side effect

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster