ra·​tio ˈrā-shē-ˌō How to pronounce ratio (audio)
plural ratios
: the indicated quotient of two mathematical expressions
: the relationship in quantity, amount, or size between two or more things : proportion
: 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 The backlash that followed included ratio stations temporarily suspending Wallen’s music, his booking agent dropping him and the Academy of Country Music barring him from nominations at the 2021 awards. Zack Sharf, Variety, 3 July 2024 The higher limit raised the NFL’s leverage ratio to two times national TV revenue. Kurt Badenhausen, Sportico.com, 2 July 2024 Midcap banks are still cheap, though, according to the report, trading at a discount of five times on their price/earnings ratio relative to historical levels. Marco Quiroz-Gutierrez, Fortune, 2 July 2024 According to Fitch, the upgrade reflects: Since 2019 (YE Sept. 30), cost management metrics have gradually improved with operating ratios (ORs) in the mid to upper 90% range for fiscal 2023 compared to 106% in 2019. Staff Report, Hartford Courant, 27 June 2024 See all Example Sentences for ratio 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ratio.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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 13 Jul. 2024.

Kids Definition


ra·​tio ˈrā-shō How to pronounce ratio (audio)
plural ratios
: the quotient of two numbers or mathematical expressions
the ratio of 6 to 3 may be expressed as 6:3, ⁶⁄₃, and 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


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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