Noun dilation has 2 senses
  1. dilation - a lengthy discussion (spoken or written) on a particular topic
    --1 is a kind of
    discussion, treatment, discourse
    Derived form: verb dilate2
  2. dilation, dilatation - the act of expanding an aperture; "the dilation of the pupil of the eye"
    --2 is a kind of expansion, enlargement
    --2 has particulars: vasodilation; mydriasis
    Derived form: verb dilate1
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