ratio

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noun ra·tio \ˈrā-(ˌ)shō, -shē-ˌō\

Definition of ratio

plural

ratios

  1. 1 a :  the indicated quotient of two mathematical expressions b :  the relationship in quantity, amount, or size between two or more things :  proportion

  2. 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

  1. What is the length-to-width ratio?

  2. <the ratio of students to teachers in the school is nine to one>

Origin and Etymology of ratio

Latin, computation, reason — more at reason


First Known Use: 1660

Other Mathematics and Statistics Terms


RATIO Defined for English Language Learners

ratio

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noun ra·tio \ˈrā-(ˌ)shō, -shē-ˌō\

Definition of ratio for English Language Learners

  • : the relationship that exists between the size, number, or amount of two things and that is often represented by two numbers


RATIO Defined for Kids

ratio

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noun ra·tio \ˈrā-shō, -shē-ˌō\

Definition of ratio for Students

plural

ratios

  1. :  the relationship in number or quantity between two or more things <the ratio of teachers to students>


Medical Dictionary

ratio

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noun ra·tio \ˈrā-(ˌ)shō, -shē-ˌō\

Medical Definition of ratio

plural

ratios

  1. :  the relationship in quantity, amount, or size between two or more things—see sex ratio



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