Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

imaginary number

noun

Definition of imaginary number

  1. :  a complex number (as 2 + 3i) in which the coefficient of the imaginary unit is not zero —called also imaginary — compare pure imaginary



Circa 1911

First Known Use of imaginary number

circa 1911


Learn More about imaginary number


Seen and Heard

What made you want to look up imaginary number? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to criticize in a loud and angry way

Get Word of the Day daily email!