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
The ratio of officers to inmates at state prisons is still too low.
—
Adam Beam, AJC.com, 20 Mar. 2026
That range spans about 370 parts-per-billion between the various estimates, with some overlapping with Fermilab’s experimental data and others, particularly from the older R-ratio methods, disagreeing with Fermilab’s data at greater than the 5-sigma threshold.
—Big Think, 19 Mar. 2026
Although Dallas County is in the lower range of debt-to-income ratios, surrounding counties such as Denton, Ellis and Kaufman recorded higher levels, data shows.
—Victoria Baeza Garcia, Dallas Morning News, 19 Mar. 2026
That’s a 100-to-1 ratio of agents to humans.
—Jake Angelo, Fortune, 19 Mar. 2026
See All Example Sentences for ratio
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Adam Beam, AJC.com, 20 Mar. 2026
That range spans about 370 parts-per-billion between the various estimates, with some overlapping with Fermilab’s experimental data and others, particularly from the older R-ratio methods, disagreeing with Fermilab’s data at greater than the 5-sigma threshold.
—Big Think, 19 Mar. 2026
Although Dallas County is in the lower range of debt-to-income ratios, surrounding counties such as Denton, Ellis and Kaufman recorded higher levels, data shows.
—Victoria Baeza Garcia, Dallas Morning News, 19 Mar. 2026
That’s a 100-to-1 ratio of agents to humans.
—Jake Angelo, Fortune, 19 Mar. 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 26 Mar. 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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