Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Characterized by insufficient or abnormally low activity.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Less than normally active.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective abnormally inactive

Etymologies

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Examples

  • And finally, a medical condition such as underactive thyroid could cause a significant drop in metabolism, so if you have noticed increased fatigue, hair loss, constipation, weight gain or dry skin, you may want to talk to your doctor about getting a simple blood test to make sure that your thyroid is not underactive.

    CNN.com 2009

  • And finally, a medical condition such as underactive thyroid could cause a significant drop in metabolism, so if you have noticed increased fatigue, hair loss, constipation, weight gain or dry skin, you may want to talk to your doctor about getting a simple blood test to make sure that your thyroid is not underactive.

    CNN.com 2009

  • And finally, a medical condition such as underactive thyroid could cause a significant drop in metabolism, so if you have noticed increased fatigue, hair loss, constipation, weight gain or dry skin, you may want to talk to your doctor about getting a simple blood test to make sure that your thyroid is not underactive.

    CNN.com 2009

  • An underactive adrenal gland does not produce enough of the hormone, cortisol, and the blood level will be low at certain times of the day.

    Dr. Susan Taylor: If You're Not Feeling Like Yourself, Here's What You Need to Know Dr. Susan Taylor 2012

  • An underactive thyroid gland may be the cause of these symptoms and an elevated TSH level which reflects a low thyroid hormone level is an excellent and inexpensive way to screen for this problem.

    Dr. Susan Taylor: If You're Not Feeling Like Yourself, Here's What You Need to Know Dr. Susan Taylor 2012

  • They have overactive inner critics and underactive inner supports.

    Jane Shure: Why You Shouldn't Follow Amy Chua's Parenting Advice Jane Shure 2011

  • In severe cases an underactive thyroid can be treated with hormone therapy and an overactive thyroid with medication, radioactive iodine, or surgery.

    How to spot an illness just by looking at someone 2011

  • An underactive thyroid gland may be the cause of these symptoms and an elevated TSH level which reflects a low thyroid hormone level is an excellent and inexpensive way to screen for this problem.

    Dr. Susan Taylor: If You're Not Feeling Like Yourself, Here's What You Need to Know Dr. Susan Taylor 2012

  • It can be caused by an overactive or underactive thyroid or thyroid nodules.

    How to spot an illness just by looking at someone 2011

  • An underactive thyroid gland may be the cause of these symptoms and an elevated TSH level which reflects a low thyroid hormone level is an excellent and inexpensive way to screen for this problem.

    Dr. Susan Taylor: If You're Not Feeling Like Yourself, Here's What You Need to Know Dr. Susan Taylor 2012

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