hypothyroidism
noun
hy·po·thy·roid·ism
ˌhī-pō-ˈthī-ˌrȯi-ˌdi-zəm 
: deficient activity of the thyroid gland
also
: a resultant bodily condition characterized by lowered metabolic rate and general loss of vigor
Examples of hypothyroidism in a Sentence
Recent Examples on the Web
Four-month-old Lil Romeo, named after the rapper, has rare congenital hypothyroidism.
—
Lisa Gutierrez, Kansas City Star, 12 Aug. 2025
People with hypothyroidism, or low thyroid levels, and vitamin deficiencies commonly experience fatigue due to slow metabolism.23
Difficulty Losing Weight
Metabolism and weight are linked.
—Angela Ryan Lee, Verywell Health, 6 Aug. 2025
Thyroid disease: Hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid) can cause temporary hair loss and hair thinning.
—Carley Millhone, Health, 4 Aug. 2025
However, the symptoms could stem from a variety of causes, including poor sleep, mental health conditions, and undiagnosed diseases such as anemia, hypothyroidism and diabetes.
—Faye Chiu, CNN Money, 1 Aug. 2025
See All Example Sentences for hypothyroidism
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Lisa Gutierrez, Kansas City Star, 12 Aug. 2025
People with hypothyroidism, or low thyroid levels, and vitamin deficiencies commonly experience fatigue due to slow metabolism.23
Difficulty Losing Weight
Metabolism and weight are linked.
—Angela Ryan Lee, Verywell Health, 6 Aug. 2025
Thyroid disease: Hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid) can cause temporary hair loss and hair thinning.
—Carley Millhone, Health, 4 Aug. 2025
However, the symptoms could stem from a variety of causes, including poor sleep, mental health conditions, and undiagnosed diseases such as anemia, hypothyroidism and diabetes.
—Faye Chiu, CNN Money, 1 Aug. 2025
See All Example Sentences for hypothyroidism
Cite this Entry
“Hypothyroidism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hypothyroidism. Accessed 21 Aug. 2025.
Copy CitationKids Definition
hypothyroidism
noun
hy·po·thy·roid·ism
ˌhī-pō-ˈthī-ˌrȯid-ˌiz-əm
: too little activity of the thyroid gland
also
: the abnormal bodily condition that results from this
hypothyroid
adjective
-ˌrȯid
Medical Definition
hypothyroidism
noun
hy·po·thy·roid·ism
-ˌiz-əm
: deficient activity of the thyroid gland
also
: a resultant bodily condition characterized by lowered metabolic rate and general loss of vigor
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