expansion

Expansion is what happens when something becomes bigger or more extensive. If you enjoy good pastry, you will be excited by the expansion of the bakery, but be careful or you will also see the expansion of your waistline.

The noun expansion is from the Latin word expansionem, which means a spreading out. Another definition for expansion is an elaboration or expanding upon something. If you're a teacher, you might be asked to give an expansion of the short talk you give students, "Homework Stinks: But Why We Need It Anyway" to parents at the school open house.

Primary Meanings of expansion

1.
n
the act of increasing (something) in size or volume or quantity or scope
2.
n
a function expressed as a sum or product of terms
Full Definitions of expansion
1

n the act of increasing (something) in size or volume or quantity or scope

Synonyms:
enlargement
Antonyms:
contraction
the act of decreasing (something) in size or volume or quantity or scope
Types:
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dilatation, dilation
the act of expanding an aperture
distension, distention
the act of expanding by pressure from within
stretching
act of expanding by lengthening or widening
inflation
the act of filling something with air
magnification
the act of expanding something in apparent size
extension
act of expanding in scope; making more widely available
vasodilation
dilation of blood vessels (especially the arteries)
tension
the action of stretching something tight
spread, spreading
act of extending over a wider scope or expanse of space or time
extension
act of stretching or straightening out a flexed limb
stretch
extension to or beyond the ordinary limit
mydriasis
reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs
Type of:
increase, step-up
the act of increasing something

n adding information or detail

Synonyms:
expanding upon
Types:
amplification, elaboration
addition of extra material or illustration or clarifying detail
annotating, annotation
the act of adding notes
subjoining, subjunction, supplementation
the act of supplementing
Type of:
increase, step-up
the act of increasing something

n a discussion that provides additional information

Synonyms:
elaboration, enlargement
Types:
expatiation
a discussion (spoken or written) that enlarges on a topic or theme at length or in detail
embellishment, embroidery
elaboration of an interpretation by the use of decorative (sometimes fictitious) detail
Type of:
discourse, discussion, treatment
an extended communication (often interactive) dealing with some particular topic
2

n a function expressed as a sum or product of terms

“the expansion of (a+b)^2 is a^2 + 2ab + b^2”
Type of:
function, map, mapping, mathematical function, single-valued function
(mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)

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