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).
An act or instance of multiplying.
In many or multiple ways.
To make threefold; to triple.
triple
three times as great
An algebraic variety of dimension 3.
by a factor of three