Dilatation \Dil`a*ta"tion\, n. [OE. dilatacioun, F. dilatation, L. dilatatio, fr. dilatare. See Dilate, and cf. 2d Dilation.]

1. Prolixity; diffuse discourse. [Obs.]

``What needeth greater dilatation?'' --Chaucer.

2. The act of dilating; expansion; an enlarging on al? sides; the state of being dilated; dilation.

3. (Anat.) A dilation or enlargement of a canal or other organ.

Source: Webster's Revised Unabridged Dictionary (1913)