Definitions

1. noun

A device used to dilate something, especially the pupil of the eye

“The ophthalmologist used a dilator to enlarge the patient’s pupil for examination.”

2. noun

A substance that causes dilation, especially of blood vessels

“The doctor prescribed a vasodilator to help lower the patient’s blood pressure.”

3. noun

Something that has the effect of dilating or expanding

“The warmth of the sun had a dilating effect on the flowers in the garden.”

4. verb

To make or become wider or more open

“The strong winds dilated the sails of the sailing boat.”