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Definitions

dilation

[dahy-ley-shuhn, dih-] / daɪˈleɪ ʃən, dɪ- /
NOUN
distention
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Caffeine temporarily shrinks blood vessels and less dilation means less visible swelling.

From BBC • Feb. 16, 2026

Not only do we tend to mirror each other’s movements, postures, facial expressions and gestures; we also uncannily sync up our heart rates, blood pressure, pupil dilation and hormonal activity.

From The Wall Street Journal • Jan. 22, 2026

This is important because insulin-assisted dilation helps move glucose from the bloodstream into body tissues, lowering blood sugar after meals.

From Science Daily • Nov. 18, 2025

Caffeine has a time dilation on it so it could be hours that I’m in there or 30 minutes.

From Los Angeles Times • Aug. 21, 2025

Such ships could not travel close enough to the speed of light for special relativistic time dilation to become important.

From "Cosmos" by Carl Sagan