hypermobility
noun
hy·per·mo·bil·i·ty
ˌhī-pər-mō-ˈbi-lə-tē 
plural hypermobilities
: an increase in the range of movement of which a body part and especially a joint is capable
… don't continually try to pop your joints (i.e., crack your knuckles). This practice tends to create hypermobility and can lead to instability of the joint.—
Yoga Journal
Yoga JournalThere is evidence that hypermobility—the loose joints that many musicians have—seems to prevent repetitive-motion injuries.—Industry Week
Industry Week
hypermobile
adjective
hypermobile joints
a hypermobile patient [=a patient with hypermobile joints]
But for me, retinal damage was a symptom of a connective-tissue disorder, characterized by hypermobile joints and the threat of auditory and visual loss.
—Richard Lane
Richard Lane
Examples of hypermobility in a Sentence
Recent Examples on the Web
My hypermobility requires strengthening and tension as a form of glue.
—Lisa Jhung, Outside, 7 Sep. 2025
Post-viral syndrome and the overlap of ADHD with hypermobility syndromes may have contributed to much worsening symptoms of brain fog, concentration difficulties and fatigue.
—Nancy Doyle, Forbes.com, 25 June 2025
In another video, a user with hypermobility—when joints have an unusually large range of motion—shares how the changing seasons worsen her symptoms.
—Alyssa Hui, Health, 28 Oct. 2024
She’s specifically dealt with injuries related to her hypermobility, which means her joints stretch further than normal.
—Vanessa Etienne, People.com, 8 Oct. 2024
In addition, individuals who have been diagnosed with hypermobility disorders, like Marfan syndrome or Ehlers-Danlos syndrome, should avoid stretching without their physician's approval.
—Tim Petrie, Dpt, Verywell Health, 10 July 2024
Many people will experience hypermobility in their joints during pregnancy as well due to the hormone relaxin.
—wendy Wisner, Parents, 3 July 2024
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Lisa Jhung, Outside, 7 Sep. 2025
Post-viral syndrome and the overlap of ADHD with hypermobility syndromes may have contributed to much worsening symptoms of brain fog, concentration difficulties and fatigue.
—Nancy Doyle, Forbes.com, 25 June 2025
In another video, a user with hypermobility—when joints have an unusually large range of motion—shares how the changing seasons worsen her symptoms.
—Alyssa Hui, Health, 28 Oct. 2024
She’s specifically dealt with injuries related to her hypermobility, which means her joints stretch further than normal.
—Vanessa Etienne, People.com, 8 Oct. 2024
In addition, individuals who have been diagnosed with hypermobility disorders, like Marfan syndrome or Ehlers-Danlos syndrome, should avoid stretching without their physician's approval.
—Tim Petrie, Dpt, Verywell Health, 10 July 2024
Many people will experience hypermobility in their joints during pregnancy as well due to the hormone relaxin.
—wendy Wisner, Parents, 3 July 2024
Cite this Entry
“Hypermobility.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hypermobility. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
hypermobility
noun
hy·per·mo·bil·i·ty
ˌhī-pər-mō-ˈbil-ət-ē
plural hypermobilities
: an increase in the range of movement of which a body part and especially a joint is capable
hypermobility of the left temporomandibular joint due to the looseness of the capsular ligaments—W. B. Farrar
W. B. FarrarLove words? Need even more definitions?
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