Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “ultrasound”


noun [U]  /ˈʌl·trəˌsɑʊnd/ us  
sound waves that are higher than people can hear, esp. ones used to examine and treat medical problems: An ultrasound scan revealed tissue damage.
(Definition of ultrasound from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of ultrasound?
Add Cambridge dictionaries to your browser to your website

Definitions of “ultrasound” in other dictionaries

Word of the Day


When animals or people stampede, they all move quickly in the same direction, often because they are frightened.

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More