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real part

American  
[ree-uhl, reel] / ˈri əl, ril /

noun

Mathematics.
  1. the number a in the complex number a + bi.


real part British  

noun

  1. the term a in a complex number a + i b , where i = √–1

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of real part

First recorded in 1960–65

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

In the mathematical description of a quantum state, the real part represents the amplitude, while the imaginary part represents the phase.

From Science Daily Jul. 13, 2026

Yet, much like the entire $7.2 trillion federal budget, it is a bit of a phantasm—part real, part fantasy, part nightmare, not likely to materialize in life, except as a warped caricature of itself.

From Slate Mar. 12, 2024

This season was so much about trauma, which is a word that has become a real part of the cultural conversation over the last few years.

From Salon Jan. 17, 2024

“That’s what this book is about — how to create a yard that is a real part of the natural world. The kind of yard where, if you look closely, something is moving.”

From Seattle Times Apr. 20, 2023

I was exhausted from Mary Day goings-on, and the real part hadn’t even started.

From "The Secret Life of Bees" by Sue Monk Kidd

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