ratio

noun

ra·​tio ˈrā-shē-ˌō How to pronounce ratio (audio)
-(ˌ)shō
plural ratios
1
a
: the indicated quotient of two mathematical expressions
b
: the relationship in quantity, amount, or size between two or more things : proportion
2
: the expression of the relative values of gold and silver as determined by a country's currency laws

Examples of ratio in a Sentence

What is the length-to-width ratio? the ratio of students to teachers in the school is nine to one
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In the Premier League, only Villa’s Jhon Duran (a goal every 87.4 minutes) and Haaland (107.4 minutes) have a better minutes-per-goal ratio than Isak (108.9). Chris Waugh, The Athletic, 23 Dec. 2024 The ratio of private funding to NFS dollars differs for each center. Frederick Dreier, Outside Online, 23 Dec. 2024 That ratio has shifted since the Dobbs decision – by July 2024, more callers were at least 20 weeks pregnant. Cait Kelley, Baltimore Sun, 21 Dec. 2024 The integration of aerial imagery, predictive analytics and computer vision drives better efficiency and improves combined ratios in today’s challenging environment. 2024 simply reinforces the need for this shift across the industry. David Tobias, Forbes, 20 Dec. 2024 See all Example Sentences for ratio 

Word History

Etymology

Latin, computation, reason — more at reason entry 1

First Known Use

1660, in the meaning defined at sense 1a

Time Traveler
The first known use of ratio was in 1660

Dictionary Entries Near ratio

Cite this Entry

“Ratio.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ratio. Accessed 7 Jan. 2025.

Kids Definition

ratio

noun
ra·​tio ˈrā-shō How to pronounce ratio (audio)
-shē-ˌō
plural ratios
1
: the quotient of two numbers or mathematical expressions
the ratio of 6 to 3 may be expressed as 6:3, ⁶⁄₃, and 2
2
: the relationship in quantity, amount, or size between two or more things
women outnumbered men in the ratio of three to one

Medical Definition

ratio

noun
plural ratios
: the relationship in quantity, amount, or size between two or more things see sex ratio

More from Merriam-Webster on ratio

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