Dictionary.com
Thesaurus.com
Synonyms

acid reflux

American  
[as-id ree-fluhks] / ˈæs ɪd ˈri flʌks /

noun

Pathology.

  1. a chronic condition in which acid from the stomach flows back into the lower esophagus, causing pain or tissue damage.

acid reflux British  

noun

  1. the regurgitation of stomach acid into the oesophagus, causing heartburn

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
acid reflux Scientific  

  1. See heartburn

Etymology

Origin of acid reflux

First recorded in 1955–60

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.

Between 40 and 70 percent of patients on these drugs report gastrointestinal adverse effects, like acid reflux, chronic diarrhea, and/or constipation.

From Slate • Mar. 22, 2026

"Maybe there's a bit more acid reflux and arthritis," he joked.

From BBC • Mar. 1, 2026

By his final year on the job, his doctor told him he was dealing with prediabetes, fatty liver disease, metabolic syndrome, sleep apnea, acid reflux, and obesity.

From Salon • Feb. 18, 2026

That includes the vast majority of people with acid reflux.

From Los Angeles Times • Sep. 16, 2024

People with acid reflux may experience heartburn and ulcers.

From Science Daily • Apr. 24, 2024

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.