ETYM Old Eng. dilatacioun, French dilatation, Latin dilatatio, from dilatare. Related to Dilate, Dilation.
1. Prolixity; diffuse discourse.
2. The act of dilating; expansion; an enlarging on all sides; the state of being dilated; dilation.
3. A dilation or enlargement of a canal or other organ.

In CAD programs, a means of specifying and possibly controlling the measurements and spatial relationships of elements in a modeled object, such as using lines, arrows, and text (that is, measurements) to indicate the length, height, and thickness of each of the walls in a modeled room or house. See also CAD.

ETYM From Latin expansus, p. p. of expandere. Related to Expand.
A wide and open space or area as of surface or land or sky; SYN. extent.

ETYM Latin expansio: cf. French expansion.
In physics, the increase in size of a constant mass of substance caused by, for example, increasing its temperature (thermal expansion) or its internal pressure. The expansivity, or coefficient of thermal expansion, of a material is its expansion (per unit volume, area, or length) per degree rise in temperature.
In mechanics, expansion refers to the increase in volume of steam in the cylinder of a steam engine after cutoff, or of gas in the cylinder of an internal-combustion engine after explosion. See also Charles's law.
1. Adding information or detail; SYN. expanding upon.
2. An interpretation that provides additional information; SYN. enlargement.
3. The act of increasing in size or volume or quantity or scope; SYN. enlargement.

ETYM Latin extensio: cf. French extension. Related to Extend.
1. A mutually agreed delay in the date set for the completion of a job or payment of a debt.
2. Act of expanding in scope; making more widely available.
3. Act of stretching or straightening out a flexed limb.
4. Amount or degree or range to which something extends; SYN. lengthiness, prolongation.
5. An additional telephone set that is connected to the same telephone line.
6. An educational opportunity provided by colleges and universities to people who not enrolled as regular students; SYN. extension service, university extension.

1. The capacity for being stretched; SYN. stretchiness, stretchability.
2. Extension to or beyond the ordinary limit
3. An unbroken period of time during which one does something; SYN. stint.
4. A large and unbroken expanse or distance
5. (Racing) A straight section of a racetrack.
6. Exercise designed to extend the limbs and muscles to their full extent; SYN. stretching.

The fractional change in length or area or volume per unit change in temperature at a given constant pressure; SYN. expansivity.

The capacity of being expanded.