Meaning of multiplication sign

multiplica'tion sign"

Pronunciation: [key]
  1. the symbol (&bultimes;), (×), or (&startimes;) between two mathematical expressions, denoting multiplication of the second expression by the first. In certain algebraic notations the sign is suppressed and multiplication is indicated by immediate juxtaposition or contiguity, as in ab.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.