To perform multiplication.
To grow in number.
To be a factor in a multiplication with (another factor).
To breed or propagate.
To increase the amount, degree or number of (something).
To perform multiplication on (a number).
In many or multiple ways.
An act or instance of multiplying.
To fold or pleat (usually used in passive).
Folded multiple times lengthwise like a fan, usually lending stiffness to a flat structure such as a leaf; corrugated; pleated.