Definitions
1.verbTo change (something) from a smaller form and/or size to a larger one; to spread out or lay open."You can expand this compact umbrella to cover a large table."
2.verbTo increase the extent, number, volume or scope of (something)."A flower expands its leaves."
3.verbTo express (something) at length and/or in detail.
4.verbTo rewrite (an expression) as a longer, yet equivalent sum of terms."Use the binomial theorem to expand {(x+1)}^4."
5.verb(of an expression) 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."
6.verbTo multiply both the numerator and the denominator of a fraction by the same natural number yielding a fraction of equal value
7.verbTo change from a smaller form/size to a larger one."Many materials expand when heated."
8.verbTo increase in extent, number, volume or scope.
9.verbTo speak or write at length or in detail."He expanded on his plans for the business."
10.verbTo feel generous or optimistic.