Dilate

usgb/daɪˈleɪt/
verb

To become larger or wider.

Pupils dilate in the dark to allow more light to enter the eye.
Visual representation of "dilate" - To become larger or wider.

Often appears as...

  • pupils dilate
  • arteries dilate

Usage tips

Technical

Definition 1 of 3
Visual representation of "dilate"
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Physical Reaction

Dilate refers to a natural, involuntary reaction of the body to certain stimuli.

Illustration for Physical Reaction
His nostrils dilated as he smelled the freshly baked pie.
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Not Always Visible

Some dilations, like blood vessels, are internal and cannot be seen.

Illustration for Not Always Visible
The doctor explained how the vessels dilate to increase blood flow.
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Light Sensitivity

Pupil dilation adjusts the eye's sensitivity to light for better vision.

Illustration for Light Sensitivity
In the dark room, her pupils dilated rapidly.
Visual representation of the word "Dilate"

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