ultrasound
noun
ul·tra·sound
ˈəl-trə-ˌsau̇nd 
plural ultrasounds
1
: vibrations of the same physical nature as sound but with frequencies above the range of human hearing
2
: the diagnostic or therapeutic use of ultrasound and especially a noninvasive technique involving the formation of a two-dimensional image used for the examination and measurement of internal body structures and the detection of bodily abnormalities
called also sonography, ultrasonography
3
: a diagnostic examination using ultrasound
The patient was scheduled for an abdominal ultrasound.
prenatal ultrasounds
Examples of ultrasound in a Sentence
They used ultrasound to examine his heart.
She had an ultrasound exam this morning.
She had an ultrasound this morning.
She showed me an ultrasound of her unborn baby.
Recent Examples on the Web
She was quickly referred for an ultrasound and biopsy.
—
Vanessa Etienne, PEOPLE, 30 Mar. 2026
Then, an ultrasound midway through pregnancy showed that her baby had anencephaly, a fatal condition in which the skull fails to develop properly.
—Jonel Aleccia, Los Angeles Times, 29 Mar. 2026
Metal poles and narrow tree branches, which reflected weaker ultrasound signals, were more difficult for the drone to detect and avoid, highlighting areas for future improvement.
—Jijo Malayil, Interesting Engineering, 27 Mar. 2026
The first question, then, is whether an ultrasound to confirm pregnancy is legally considered medical care in Texas.
—Emily Brindley
health Reporter, Dallas Morning News, 27 Mar. 2026
See All Example Sentences for ultrasound
Examples are automatically compiled from online sources to
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Vanessa Etienne, PEOPLE, 30 Mar. 2026
Then, an ultrasound midway through pregnancy showed that her baby had anencephaly, a fatal condition in which the skull fails to develop properly.
—Jonel Aleccia, Los Angeles Times, 29 Mar. 2026
Metal poles and narrow tree branches, which reflected weaker ultrasound signals, were more difficult for the drone to detect and avoid, highlighting areas for future improvement.
—Jijo Malayil, Interesting Engineering, 27 Mar. 2026
The first question, then, is whether an ultrasound to confirm pregnancy is legally considered medical care in Texas.
—Emily Brindley
health Reporter, Dallas Morning News, 27 Mar. 2026
See All Example Sentences for ultrasound
Cite this Entry
“Ultrasound.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrasound. Accessed 7 Apr. 2026.
Copy CitationKids Definition
ultrasound
noun
ul·tra·sound
ˈəl-trə-ˌsau̇nd
1
: ultrasonic vibrations
2
: the use of ultrasound for medical diagnosis or treatment and especially a technique involving the formation of a two-dimensional image used for examining internal body structures and detecting abnormalities in the body
Medical Definition
ultrasound
1 of 2 noun
ul·tra·sound
ˈəl-trə-ˌsau̇nd
1
: vibrations of the same physical nature as sound but with frequencies above the range of human hearing compare infrasound
2
: the diagnostic or therapeutic use of ultrasound and especially a noninvasive technique involving the formation of a two-dimensional image used for the examination and measurement of internal body structures and the detection of bodily abnormalities
called also echography, sonography, ultrasonography
3
: a diagnostic examination using ultrasound
ultrasound
2 of 2 adjective
: of, relating to, performed by, using, or specializing in ultrasound
an ultrasound technician
ultrasound imaging
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