Definitionen
1.VerbTo 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."
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
{\displaystyle {(x+1)}^{4}}
."
5.VerbTo become, by rewriting, a longer, yet equivalent, sum of terms."The expression
(
x
+
1
)
4
{\displaystyle {(x+1)}^{4}}
expands to
x
4
+
4
x
3
+
6
x
2
+
4
x
+
1
{\displaystyle x^{4}+4x^{3}+6x^{2}+4x+1}
."
6.VerbTo multiply both the numerator and the denominator of a fraction by the same (non-zero) number (which yields a fraction of equal value)."Expanding
4
/
7
{\displaystyle 4/7}
by
3
{\displaystyle 3}
gives
12
/
21
{\displaystyle 12/21}
."
7.VerbTo 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."
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.
11.VerbIn a hierarchical list (such as a directory tree or table of contents), to show the subentries of (an entry).