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
Klinger cautions against drinking coffee on an empty stomach, which can irritate the stomach lining and lead to acid reflux or bloating.
—Embry Roberts, Martha Stewart, 25 Apr. 2026
Taking it on an empty stomach versus alongside food makes no meaningful difference in how your body processes it, and some people find straight shots cause nausea or acid reflux.
—Allison Palmer, Fort Worth Star-Telegram, 24 Apr. 2026
They're used to reduce stomach acid and treat heartburn, acid reflux, and stomach ulcers.
—Amber Brenza, Health, 24 Apr. 2026
After an acid reflux pill couldn’t soothe the fiery feeling, her husband suggested a trip to the emergency room.
—Caleb Hellerman, CNN Money, 20 Apr. 2026
See All Example Sentences for acid reflux
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Embry Roberts, Martha Stewart, 25 Apr. 2026
Taking it on an empty stomach versus alongside food makes no meaningful difference in how your body processes it, and some people find straight shots cause nausea or acid reflux.
—Allison Palmer, Fort Worth Star-Telegram, 24 Apr. 2026
They're used to reduce stomach acid and treat heartburn, acid reflux, and stomach ulcers.
—Amber Brenza, Health, 24 Apr. 2026
After an acid reflux pill couldn’t soothe the fiery feeling, her husband suggested a trip to the emergency room.
—Caleb Hellerman, CNN Money, 20 Apr. 2026
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 3 May. 2026.
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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