1. the act or process of expanding: the new nation's expansion westward.
2. the state of being expanded.
3. an expanded part: an expansion of a river.
4. A product of expanding: a book that is an expansion of the author's ph.D. thesis.
5. the extent or amount by which something has expanded.
6. mathematics A quantity written in an extended form, such as in a sum or product of terms.
7. mathematics the process of obtaining this form.
8. an expanse.
9. A period of increased economic or business activity.

1. the act or process of expanding.
2. the fractional change in unit length per unit length per unit temperature change.
3. A new addition.
4. A product to be used with a previous product.

1. the act of expanding or spreading out; the condition of being expanded; dilation; enlargement.
2. that which is expanded; expanse; extend surface.
3. space through which anything is expanded; also, pure space.
4. an increase in the production of goods and services over time, and in the volume of business transactions, generally associated with an increase in employment and an increase in the money supply. opposite of
5. the developed result of an indicated operation.
6. the operation of steam in a cylinder after its communication with the boiler has been cut off, by which it continues to exert pressure upon the moving piston.
7. the enlargement of the ship mathematically from a model or drawing to the full or building size, in the process of construction.
8. an enlarged or extended version of something, such as a writing or discourse.
9. an expansion joint. see below.

1. the act of expanding.
2. the act of extending or distending, or of increasing in extent, size, bulk, amount, etc.
3. the state of being expanded; enlargement; distention; dilatation; increase of extent, size, bulk, amount, etc.
4. specifically the increase in bulk of steam in the cylinder of an engine when its communication with the boiler is cut off, in which case its pressure on the piston retreating before it is in inverse ratio to the space it fills.
5. A part which constitutes an increase or in which the expanding occurs; specifically, in entomology, a flat projection of a margin, generally lateral: as, a frontal expansion covering the base of the antennæ.
6. extension or spread of space; extent in general; hence, wide extent; immensity.
7. in mathematics, the development at length of an expression indicated in a contracted form, especially by means of the distributive principle.
8. in ship-building, a drawing in which a curved or warped surface, as a ship's outside plating or a longitudinal, is laid out or expanded on a plane surface by conventional methods to show approximately the true relations and dimensions of the parts.

1. a discussion that provides additional information
2. the act of increasing (something) in size or volume or quantity or scope
3. a function expressed as a sum or product of terms
4. adding information or detail