1. The act of dilating; expansion; the state of being expanded.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• diatition,
• delaration,
• platation,
• dialation,
• delamation,
• dissatation,
• delagation,
• donatation,
• relatation,
• deletation,
• disitation,
• dilitation,
• dicatation,
• dietation,
• diliation,
• declatation,
• dillatation,
• dylatation,
• dilation,
• divagation

The adjective form of "dilatation" is "dilatative".

The plural of the "dilatation" can be the "dilatations".

The singular of the "dilatation" can be the "dilatation".