odd number

American  

[od nuhm-ber] / ˈɒd ˈnʌm bər /

noun

odd numbers plural

1. a number that leaves a remainder of 1 when divided by 2.

   7, 13, and 195 are odd numbers.

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Other Word Forms

Noun Inflected Forms

• odd numbers
  plural

Etymology

Origin of odd number

First recorded in 1350–1400

Example Sentences

See Examples For:

odd number

Others throw the number out entirely and follow what many Southern Italian families have long done: just make an odd number of fish dishes.

From Salon ● Dec. 14, 2025

They are classified as odd-Z elements -- possessing an odd number of protons -- and are crucial for both life and the development of planets.

From Science Daily ● Dec. 8, 2025

Of those who remain, if your Social Security number starts with an even number, you’re in, and if it starts with an odd number, you’re out.

From Slate ● Nov. 14, 2024

And then there’s the annoying odd number thing, based on the specious notion that readers are more curious about the specificity of, say, nine and 21 than 10 and 20.

From Los Angeles Times ● Jan. 3, 2024

Then Jason and Carter go, and then the others, and then suddenly, because we have an odd number of players now, I’m the only one who hasn’t double-high-fived my teammates.

From "A High Five for Glenn Burke" by Phil Bildner