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expansion

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Expansion is defined as the act of getting bigger or something added onto something else.

(noun)

An example of an expansion is an extra three rooms built onto a house.

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See expansion in Webster's New World College Dictionary

noun

an expanding or being expanded; enlargement; dilation
an expanded thing or part
the amount, degree, or extent of expansion
a development or full treatment, as of a topic
the process or result of working out or giving the full form of a contraction, equation, etc.
Mech. the expanding 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

Origin: LL expansio < L expansus: see expanse

See expansion in American Heritage Dictionary 4

noun

a. The act or process of expanding: the new nation's expansion westward.
b. The state of being expanded.
a. An expanded part: an expansion of a river.
b. A product of expanding: a book that is an expansion of the author's Ph.D. thesis.
The extent or amount by which something has expanded.
Mathematics
a. A quantity written in an extended form, such as in a sum or product of terms.
b. The process of obtaining this form.
An expanse.
A period of increased economic or business activity.

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