multiply verb

ADV. fourfold, fivefold, manifold, etc. Just imagine all the problems we've been having, multiplied a thousandfold. | endlessly, indefinitely | quickly, rapidly micro-organisms that multiply rapidly | together, up Multiply these two figures together. If you are cooking for more people, just multiply up the quantities.

PREP. by 2 multiplied by 4 makes 8 (= 2~4