bladder

noun

blad·​der ˈbla-dər How to pronounce bladder (audio)
1
a
: a membranous sac in animals that serves as the receptacle of a liquid or contains gas
especially : urinary bladder
b
: a gas- or air-filled vesicle in certain algae and aquatic plants (such as rockweed) : air bladder sense b
2
: something (such as the rubber bag inside a football) resembling a bladder
bladderlike
ˈbla-dər-līk How to pronounce bladder (audio)
adjective

Examples of bladder in a Sentence

Recent Examples on the Web
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.
Some studies have described BPC-157 being used to treat knee pain, a chronic bladder condition known as interstitial cystitis and ulcerative colitis, a common type of inflammatory bowel disease that can cause inflammation and ulcers in the colon. — Jacqueline Howard, CNN Money, 31 July 2026 Organizers note that standard-size backpacks with hydration bladders will not be permitted at the event. — Noe Padilla, USA Today, 31 July 2026 The State Department formally designated Hekmati, who has bladder cancer, as wrongfully detained in March. — Efrat Lachter, FOXNews.com, 28 July 2026 While the Hyerboot offered full foot compression and heat using a high-top boot packed with the brand’s Normatec bladders bonded to warming elements, the $249 Hyperslide performs with a single pod worked into the strap across the top of the foot. — Tim Newcomb, Forbes.com, 27 July 2026 See All Example Sentences for bladder

Word History

Etymology

Middle English, from Old English blǣdre; akin to Old High German blātara bladder, Old English blāwan to blow

First Known Use

before the 12th century, in the meaning defined at sense 1a

Time Traveler
The first known use of bladder was before the 12th century

Phrases Containing bladder

Rhymes for bladder

See All Rhymes for bladder

Browse Nearby Words

blad
bladder
bladder-and-string
See all Nearby Words

Cite this Entry

“Bladder.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bladder. Accessed 5 Aug. 2026.

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Kids Definition

bladder

noun
blad·​der ˈblad-ər How to pronounce bladder (audio)
1
: a pouch in an animal in which a liquid or gas is stored
especially : one into which urine passes from the kidneys and is stored temporarily until discharged by way of the urethra
2
: something resembling a bladder
especially : a bag or container that can be blown up with air
bladderlike
-ˌlīk How to pronounce bladder (audio)
adjective

Medical Definition

bladder

noun
blad·​der ˈblad-ər How to pronounce bladder (audio)
1
: a membranous sac in animals that serves as the receptacle of a liquid or contains gas
especially : urinary bladder
2
: a vesicle or pouch forming part of an animal body
the bladder of a tapeworm larva

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