ratio

[ rey-shoh, -shee-oh ]
/ ˈreɪ ʃoʊ, -ʃiˌoʊ /

noun, plural ra·tios.

the relation between two similar magnitudes with respect to the number of times the first contains the second: the ratio of 5 to 2, written 5:2 or 5/2.
proportional relation; rate: the ratio between acceptances and rejections.
Finance. the relative value of gold and silver in a bimetallic currency system.

Origin of ratio

1630–40; < Latin ratiō a reckoning, account, calculation, derivative (see -tion) of the base of rērī to judge, think

Definition for ratio (2 of 2)

ultima ratio regum
[ oo l-ti-mah rah-tee-oh rey-goo m; English uhl-tuh-muh rey-shee-oh ree-guh m ]
/ ˈʊl tɪˌmɑ ˈrɑ tiˌoʊ ˈreɪ gʊm; English ˈʌl tə mə ˈreɪ ʃiˌoʊ ˈri gəm /

Latin.

the final argument of kings (a resort to arms): motto engraved on the cannon of Louis XIV.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ratio

British Dictionary definitions for ratio

ratio
/ (ˈreɪʃɪˌəʊ) /

noun plural -tios

a measure of the relative size of two classes expressible as a proportionthe ratio of boys to girls is 2 to 1
maths a quotient of two numbers or quantitiesSee also proportion (def. 6)

Word Origin for ratio

C17: from Latin: a reckoning, from rērī to think; see reason
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for ratio

ratio
[ rāshō, rāshē-ō′ ]

n. pl. ra•tios

Relation in degree or number between two similar things.
The relation between two quantities expressed as the quotient of one divided by the other.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for ratio

ratio
[ rāshō, rāshē-ō′ ]

A relationship between two quantities, normally expressed as the quotient of one divided by the other. For example, if a box contains six red marbles and four blue marbles, the ratio of red marbles to blue marbles is 6 to 4, also written 6:4. A ratio can also be expressed as a decimal or percentage.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Culture definitions for ratio

ratio
[ (ray-shee-oh, ray-shoh) ]

An expression of the relative size of two numbers by showing one divided by the other.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.