ratio
noun
ra·tio
ˈrā-shē-ˌō 
-(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
Most variations build from that foundation, adjusting ratios or swapping ingredients based on water type and personal preference.
—
Ryan Brennan
may 13, Miami Herald, 13 May 2026
The researchers were looking mainly at the ratio between two types of helium — helium-3 and helium-4.
—Jacopo Prisco, CNN Money, 13 May 2026
The ratio of Cboe's S&P 500 Constituent Volatility Index VIXEQ to VIX has widened to the 98th percentile as correlations remain low.
—Oliver Renick, CNBC, 12 May 2026
In Los Angeles, the Democrat to Republican ratio is even higher.
—Los Angeles Times, 12 May 2026
See All Example Sentences for ratio
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Ryan Brennan
may 13, Miami Herald, 13 May 2026
The researchers were looking mainly at the ratio between two types of helium — helium-3 and helium-4.
—Jacopo Prisco, CNN Money, 13 May 2026
The ratio of Cboe's S&P 500 Constituent Volatility Index VIXEQ to VIX has widened to the 98th percentile as correlations remain low.
—Oliver Renick, CNBC, 12 May 2026
In Los Angeles, the Democrat to Republican ratio is even higher.
—Los Angeles Times, 12 May 2026
See All Example Sentences for ratio
Cite this Entry
“Ratio.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ratio. Accessed 14 May. 2026.
Copy CitationKids Definition
ratio
noun
ra·tio
ˈrā-shō
-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
ra·tio
ˈrā-(ˌ)shō, -shē-ˌō
plural ratios
: the relationship in quantity, amount, or size between two or more things see sex ratio
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