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Expand vs. Expound: What's the Difference?

Expand and Expound Definitions

Expand

To increase the size, volume, quantity, or scope of; enlarge
Expanded her store by adding a second room.

Expound

To explain in detail; elucidate
She expounded her theory on the origin of the conflict.

Expand

To express at length or in detail; enlarge on
Expanded his remarks afterward.

Expound

To make known or set forth; present
"In the 1956 campaign he cheerfully expounded views that had gravely disturbed him four years earlier" (Helen Sasson).

Expand

To open (something) up or out; spread out
The bird expanded its wings and flew off.
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Expound

To make a detailed statement
The professor was expounding on a favorite topic.

Expand

(Mathematics) To write (a quantity) as a sum of terms in an extended form.

Expound

(transitive) To set out the meaning of; to explain or discuss at length

Expand

To become greater in size, volume, quantity, or scope
Air expands when heated. This critic's influence is expanding.

Expound

(intransitive) To make a statement, especially at length.
He expounded often on the dangers of the imperial presidency.
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Expand

To speak or write at length or in detail
Expand on a favorite topic.

Expound

To lay open; to expose to view; to examine.
He expounded both his pockets.

Expand

To open up or out; unfold
The chair expands to form a daybed.

Expound

To lay open the meaning of; to explain; to clear of obscurity; to interpret; as, to expound a text of Scripture, a law, a word, a meaning, or a riddle.
Expound this matter more fully to me.

Expand

(transitive) To change (something) from a smaller form or size to a larger one; to spread out or lay open.
You can expand this compact umbrella to cover a large table.
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Expound

Add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing;
She elaborated on the main ideas in her dissertation

Expand

(transitive) To increase the extent, number, volume or scope of (something).
A flower expands its leaves.

Expound

State;
Set forth one's reasons

Expand

(transitive) To express (something) at length and/or in detail.

Expand

To rewrite (an expression) as a longer, yet equivalent sum of terms.
Use the binomial theorem to expand {(x+1)}^4.

Expand

To become, by rewriting, a longer, yet equivalent sum of terms.
The expression {(x+1)}^4 expands to x^4 + 4x^3 + 6x^2 + 4x + 1.

Expand

To multiply both the numerator and the denominator of a fraction by the same natural number yielding a fraction of equal value

Expand

(intransitive) To change or grow from smaller to larger in form, number, or size.
Many materials expand when heated.
This compact umbrella expands to cover a large table.

Expand

(intransitive) To increase in extent, number, volume or scope.

Expand

(intransitive) To speak or write at length or in detail.
He expanded on his plans for the business.

Expand

(intransitive) To feel generous or optimistic.

Expand

To lay open by extending; to open wide; to spread out; to diffuse; as, a flower expands its leaves.
Then with expanded wings he steers his flight.

Expand

To cause the particles or parts of to spread themselves or stand apart, thus increasing bulk without addition of substance; to make to occupy more space; to dilate; to distend; to extend every way; to enlarge; - opposed to contract; as, to expand the chest; heat expands all bodies; to expand the sphere of benevolence.

Expand

To state in enlarged form; to develop; as, to expand an equation. See Expansion, 5.

Expand

To become widely opened, spread apart, dilated, distended, or enlarged; as, flowers expand in the spring; metals expand by heat; the heart expands with joy.

Expand

Extend in one or more directions;
The dough expands

Expand

Become larger in size or volume or quantity;
His business expanded rapidly

Expand

Make bigger or wider in size, volume, or quantity;
Expand the house by adding another wing

Expand

Grow stronger;
The economy was booming

Expand

Exaggerate or make bigger;
The charges were inflated

Expand

Add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing;
She elaborated on the main ideas in her dissertation

Expand

Expand the influence of;
The King extended his rule to the Eastern part of the continent

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