American English

Definition of dilate verb from the Oxford Advanced American Dictionary



, NAmE//daɪˈleɪt//
[intransitive, transitive]Verb Forms present simple I / you / we / they dilate
he / she / it dilates
past simple dilated
-ing form dilating
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to become or to make something larger, wider, or more open Her eyes dilated with fear. dilate something dilated pupils/nostrils Red wine can help to dilate blood vessels. opposite contract
noun [uncountable, countable] The doctor checked his eyes but there was no abnormal pupil dilation.
See the Oxford Advanced Learner's Dictionary entry: dilate