Etymology

Verb

1. To change (something) from a smaller form and/or size to a larger one.

   You can expand this compact umbrella to cover a large table.

2. To increase the extent, number, volume or scope of (something).
3. To express (something) at length and/or in detail.
4. To rewrite (an expression) as a longer, yet equivalent sum of terms.

   Use the binomial theorem to expand $\{(x+1)\}^4$ to $x^4\; +\; 4x^3\; +\; 6x^2\; +\; 4x\; +\; 1$

5. To (be) change(d) from a smaller form/size to a larger one.

   Many materials expand when heated.

   This compact umbrella expands to cover a large table.

6. To (be) increase(d) in extent, number, volume or scope.
7. To speak or write at length or in detail.

   He's so pedantic, he expands on everything!

8. To feel generous or optimistic.
9. To be rewritten as a longer, yet equivalent sum of terms.

   The expression $\{(x+1)\}^4$ expands to $x^4\; +\; 4x^3\; +\; 6x^2\; +\; 4x\; +\; 1$.

Synonyms

Related terms

• expanse
• expansible
• expansile
• expansive
• expansion
• expansionism