What does distension mean?
Distension is a noun describing the state of being swollen or stretched outward by pressure from within. In everyday use it appears most often in medicine, where doctors refer to abdominal distension — a bloated, swollen belly caused by excess gas, fluid, or other contents pressing on the abdominal wall. Similar terms describe gastric distension (an overstretched stomach) or venous distension (swollen, visibly filled veins). Beyond anatomy, the word can apply to anything expanded by internal force, such as a balloon or membrane under strain. Derived from the Latin verb tendere, meaning "to stretch," distension shares its roots with words like extend and tendon, which explains why it suggests something pulled taut rather than merely puffy. It is formal in tone and largely confined to technical writing, making it a precise alternative to looser words like bloating or swelling when accuracy matters.
nounThe state of being swollen or enlarged because of pressure from inside, especially the abnormal swelling of a part of the body caused by gas, fluid, or other contents.
- Swelling or enlargement of a body part, especially the abdomen, caused by internal pressure from gas, fluid, or contents.
- More generally, the act or state of expanding or being expanded by pressure from within.
"The patient presented with marked abdominal distension and discomfort."
"The X-ray revealed significant gastric distension after the overeating episode."
"Engineers monitored the distension of the balloon as it was inflated for testing."
Usually uncountable when referring to the general condition; the plural appears occasionally in medical texts referring to distinct instances or episodes of swelling.
"Repeated gastric distensions were observed during the study."
From the Latin tendere, 'to stretch' — the same root that gives us tendon and tense, so every case of abdominal distension literally involves your insides being stretched taut.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of distension
Distension derives from the Latin verb tendere, meaning "to stretch," via the stem of distendere, "to stretch apart or swell." It entered English through Latin participial forms, becoming established as a learned, technical term. Its cognates include extend, tendon, and tense, all built on the same stretch-root that also produced words like tension and attention.
Related word forms
How distension is actually used
Formal and chiefly technical in register, appearing most often in medical and scientific contexts such as clinical examinations and imaging reports. It carries a neutral connotation but implies an abnormal or at least noticeable state of swelling. The variant spelling "distention" is more common in American usage.
Easily confused with distension
"Distention" is simply a variant spelling of "distension" meaning the same thing; "distension" is the preferred form in British English and common in American medical writing.
"Distinctness" means clarity or the quality of being clearly different, while "distension" refers to swelling or stretching of a body part.