Webster's Revised Unabridged Dictionary · 1913

Dilation

Dilation , noun

[Latin dilatio. See Dilatory.]

Delay. [Obsolete] — Bp. Hall

Dilation , noun

[From dilate, v., compare Dilatation, Dilator.]

The act of dilating, or the state of being dilated; expansion; dilatation. — Mrs. Browning
At first her eye with slow dilation rolled. — Tennyson
A gigantic dilation of the hateful figure. — Dickens