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 city has more unmarried women than men, with a ratio of about 93 men for every 100 women.
—
Jordan Green, Memphis Commercial Appeal, 9 Feb. 2026
Always Read the Label Because every fertilizer has a different formulation, there’s no universal winter ratio.
—Gemma Johnstone, The Spruce, 8 Feb. 2026
That ratio is thought to indicate how well the placenta is functioning, McDonald said.
—Nicole Villalpando, Austin American Statesman, 7 Feb. 2026
Many liked the texture of the peanut butter and felt the chocolate to peanut butter ratio was balanced, so this may be a good option for those that like their cups on the sweeter side.
—Melinda Salchert, Southern Living, 7 Feb. 2026
See All Example Sentences for ratio
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Jordan Green, Memphis Commercial Appeal, 9 Feb. 2026
Always Read the Label Because every fertilizer has a different formulation, there’s no universal winter ratio.
—Gemma Johnstone, The Spruce, 8 Feb. 2026
That ratio is thought to indicate how well the placenta is functioning, McDonald said.
—Nicole Villalpando, Austin American Statesman, 7 Feb. 2026
Many liked the texture of the peanut butter and felt the chocolate to peanut butter ratio was balanced, so this may be a good option for those that like their cups on the sweeter side.
—Melinda Salchert, Southern Living, 7 Feb. 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 13 Feb. 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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