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English definition of “dilate”

dilate

verb [I/T]  /dɑɪˈleɪt, ˈdɑɪ·leɪt/ esp. medical us  
to become or make something, esp. an opening, wider or more open: [T] The doctor put drops in my eyes to dilate the pupils.
(Definition of dilate from the Cambridge Academic Content Dictionary © Cambridge University Press)
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