acid reflux
noun
: backward flow of the acidic contents of the stomach into the esophagus that is due to malfunctioning of a sphincter at the lower end of the esophagus and that results especially in heartburn : gastroesophageal reflux
a medication for acid reflux
Acid reflux is the backflow of stomach contents into the esophagus. The feeling of acid reflux is heartburn: a mild burning sensation in the mid-chest …—
The Tennessee Tribune
The Tennessee TribuneAcid reflux occurs when the valve between your esophagus and stomach doesn't close properly, allowing stomach acid to wash back up through your esophagus …—Miriam Jones Bradley
Miriam Jones BradleyExamples of acid reflux in a Sentence
Recent Examples on the Web
Some Probiotic Studies Show Acid Reflux Improvement Gastroesophageal reflux (also called acid reflux, or heartburn) occurs when the contents of your stomach flow up into the esophagus.
—Karen Berger, Verywell Health, 27 Oct. 2025
As a singer, few things scare me more than acid reflux.
—Emily Blackwood, PEOPLE, 21 Oct. 2025
Studies show that angling yourself upright during sleep can help combat a number of related issues—including sleep apnea, acid reflux, lower back pain, and snoring.
—Nashia Baker, Architectural Digest, 10 Oct. 2025
Their natural acidity can also aggravate acid reflux, GERD or mouth irritation in sensitive individuals.
—Daryl Austin, USA Today, 20 Sep. 2025
See All Example Sentences for acid reflux
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Karen Berger, Verywell Health, 27 Oct. 2025
As a singer, few things scare me more than acid reflux.
—Emily Blackwood, PEOPLE, 21 Oct. 2025
Studies show that angling yourself upright during sleep can help combat a number of related issues—including sleep apnea, acid reflux, lower back pain, and snoring.
—Nashia Baker, Architectural Digest, 10 Oct. 2025
Their natural acidity can also aggravate acid reflux, GERD or mouth irritation in sensitive individuals.
—Daryl Austin, USA Today, 20 Sep. 2025
See All Example Sentences for acid reflux
Cite this Entry
“Acid reflux.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acid%20reflux. Accessed 4 Nov. 2025.
Copy CitationMedical Definition
acid reflux
noun
: backward flow of the acidic contents of the stomach into the esophagus that is due to malfunctioning of a sphincter at the lower end of the esophagus and that results especially in heartburn : gastroesophageal reflux
… people who report experiencing at least weekly symptoms of acid reflux have substantially higher risks of BE [=Barrett's esophagus] than those with less frequent episodes. Moreover, we found that symptoms of acid reflux experienced at older ages conferred substantially higher risks of BE than symptoms at younger ages …—Kylie J. Smith et al., Cancer Epidemiology, Biomarkers & Prevention
Kylie J. Smith et al., Cancer Epidemiology, Biomarkers & PreventionLove words? Need even more definitions?
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