Verb

To increase the amount, degree or number of (something).

* Ames

Impunity will multiply motives to disobedience.

(arithmetic) To perform multiplication on (a number).

To grow in number.

To breed or propagate.

* {{quote-magazine, date=2013-07-20, volume=408, issue=8845, magazine=(The Economist)

, title= Welcome to the plastisphere , passage=[The researchers] noticed many of their pieces of [plastic marine] debris sported surface pits around two microns across.

(arithmetic) To perform multiplication.

(rare) To be a factor in a multiplication with (another factor).

* 1983 , Graham Flegg, Numbers , 2002 edition, ISBN 0486421651, page 154 [http://books.google.com/books?id=C0Wcb9c6c18C&pg=PA154&dq=multiplies]:

This follows a similar process, counters having to be removed and replaced at each stage of the remaining part of the calculation except the final one, where 2 multiplies 3 to give 6.

* 1993 , Edward T. Dowling, (w, Schaum's Outline) of Theory and Problems of Mathematical Methods for Business and Economics , ISBN 0070176744, page 14 [http://books.google.com/books?id=8PaQk7LodfoC&pg=PA14&dq=multiplies]:

Of all the possible combinations of factors above, only $(2\backslash cdot4)+(3\backslash cdot5)=23$. Carefully arranging the factors, therefore, to ensure that 2 multiplies' 4 and 3 ' multiplies 5, we have

*:: $6x^2+23x+20=(2x+5)(3x+4)$