complex number definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any number expressed as a + bi, where a and b are real numbers and i is the imaginary unit, : if b is zero it is a real number, but if b is not zero it is an imaginary number
complex number definition by American Heritage Dictionary
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Any number of the form a + bi, where a and b are real numbers and i is an imaginary number whose square equals -1.
complex number - Science Definition
A number that can be expressed in terms of i (the square root of -1). Mathematically, such a number can be written a + bi, where a and b are real numbers. An example is 4 + 5i.