Dictionary

ratio

noun ra·tio \ˈrā-(ˌ)shō, -shē-ˌō\

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

plural ra·tios

Full Definition of RATIO

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
ADVERTISEMENT

Examples of RATIO

  1. What is the length-to-width ratio?
  2. <the ratio of students to teachers in the school is nine to one>

Origin of RATIO

Latin, computation, reason — more at reason
First Known Use: 1660

Related to RATIO

Other Mathematics and Statistics Terms

abscissa, denominator, divisor, equilateral, exponent, hypotenuse, logarithm, oblique, radii, rhomb

Rhymes with RATIO

acid snow, afterglow, aikido, alpenglow, apropos, art deco, art nouveau, audio, Baguio, Bamako, barrio, bay window, Bergamo, bibelot, Bilbao, black widow, blow-by-blow, body blow, bone marrow, bordereau, Borneo, bow window, buffalo, Buffalo, bungalow, Bushido, buteo, calico, cameo, cachalot, cembalo, centimo, CEO, chassepot, cheerio, Clemenceau, cogito, comedo, comme il faut, counterflow, Cupid's bow, curaçao, Curaçao, curassow, curio, daimyo, danio, Delano, Diderot, do-si-do, domino, dynamo, embryo, entrepôt, Erato, escargot, Eskimo, extrados, fabliau, folio, French window, fricandeau, furbelow, gigolo, golden glow, go-no-go, grass widow, guacharo, hammer throw, hammertoe, haricot, heel-and-toe, hetero, high and low, HMO, Holy Joe, horror show, Idaho, in a row, indigo, in escrow, in the know, Jericho, kakapo, latigo, little toe, long-ago, Longfellow, Maceió, Maginot, Manchukuo, medico, Mexico, mistletoe, modulo, Monaco, Navajo, NCO, nuncio, oleo, olio, on tiptoe, Oreo, overflow, overgrow, overthrow, ovolo, Pamlico, Papago, paseo, picaro, piccolo, Pierrot, polio, pomelo, pompano, portico, PPO, Prospero, proximo, quid pro quo, radio, raree-show, Richard Roe, Rochambeau, rococo, rodeo, Romeo, rose window, round window, saddlebow, Sapporo, sapsago, Scapa Flow, Scipio, Scorpio, semipro, show window, sloppy joe, so-and-so, SRO, standing O, status quo, stereo, stop-and-go, studio, subito, tallyho, tangelo, Taranto, tic-tac-toe, TKO, to-and-fro, Tokyo, tombolo, touch-and-go, tournedos, tremolo, tuckahoe, tupelo, UFO, ultimo, undergo, undertow, Veneto, vertigo, vibrio, video, virago, vireo, Zhangjiakou, zydeco
RATIOS Defined for Kids

ratio

noun ra·tio \ˈrā-shō, -shē-ˌō\
plural ra·tios

Definition of RATIO for Kids

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

ratio

noun ra·tio \ˈrā-(ˌ)shō, -shē-ˌō\
plural ra·tios

Medical Definition of RATIO

:  the relationship in quantity, amount, or size between two or more things—see sex ratio
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears