- 1
To change (something) from a smaller form or size to a larger one; to spread out or lay open.transitive
- You can expand this compact umbrella to cover a large table.
- 2
To increase the extent, number, volume or scope of (something).transitive
- A flower expands its leaves.
- 3
To express (something) at length and/or in detail.transitive
- 4
To rewrite (an expression) as a longer, yet equivalent, sum of terms.transitive
- Use the binomial theorem to expand #123;(x#43;1)#125;⁴.
- 5
To become, by rewriting, a longer, yet equivalent, sum of terms.intransitive
- The expression #123;(x#43;1)#125;⁴ expands to x⁴#43;4x³#43;6x²#43;4x#43;1.
- 6
To multiply both the numerator and the denominator of a fraction by the same (non-zero) number (which yields a fraction of equal value).transitive
- Expanding 4#47;7 by 3 gives 12#47;21.
- 7
To change or grow from smaller to larger in form, number, or size.intransitive
- Many materials expand when heated.
- This compact umbrella expands to cover a large table.
- 8
To increase in extent, number, volume or scope.intransitive
- 9
To speak or write at length or in detail.intransitive
- He expanded on his plans for the business.
- 10
To feel generous or optimistic.intransitive
syn. elaborate · expand on
ant. contract · limit · factor