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
Francisco Gaspar-Andres, a Guatemalan who ICE has said entered the US illegally, received medical care several times following his September 1 detainment for issues including alcohol withdrawal, acid reflux, flu-like symptoms and hypertension, according to an ICE statement last month.
—Elizabeth Wolfe, CNN Money, 22 Jan. 2026
Heartburn, acid reflux, and diuretic medications can also lower magnesium levels.
—Health, 20 Jan. 2026
Some people find that drinking it on an empty stomach, such as before breakfast, can also lead to digestive upset or acid reflux.
—Sohaib Imtiaz, Verywell Health, 20 Jan. 2026
Those with acid reflux, or chronic acid reflux known as gastroesophageal reflux disease (GERD), anxiety, or sleep issues should steer clear, says Gandhi.
—Emma Loewe, Outside, 12 Jan. 2026
See All Example Sentences for acid reflux
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Elizabeth Wolfe, CNN Money, 22 Jan. 2026
Heartburn, acid reflux, and diuretic medications can also lower magnesium levels.
—Health, 20 Jan. 2026
Some people find that drinking it on an empty stomach, such as before breakfast, can also lead to digestive upset or acid reflux.
—Sohaib Imtiaz, Verywell Health, 20 Jan. 2026
Those with acid reflux, or chronic acid reflux known as gastroesophageal reflux disease (GERD), anxiety, or sleep issues should steer clear, says Gandhi.
—Emma Loewe, Outside, 12 Jan. 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 28 Jan. 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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