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 contractverbjump to other results
NAmE//ˈdaɪleɪt//, NAmE//daɪˈleɪt//[intransitive, transitive]Verb Forms present simple I / you / we / they dilate
he / she / it dilates
past simple dilated
-ing form dilating
dilationjump to other results
NAmE//daɪˈleɪʃn//noun [uncountable, countable] The doctor checked his eyes but there was no abnormal pupil dilation.