- a measure of the relative size of two classes expressible as a proportion: the ratio of boys to girls is 2 to 1
- a quotient of two numbers or quantities
See also proportion
WordReference Random House Learner's Dictionary of American English © 2020
ra•tio^{} /ˈreɪʃoʊ, -ʃiˌoʊ/USA pronunciation
n.[countable], pl. -tios.
-ratio-,^{} root.
WordReference Random House Unabridged Dictionary of American English © 2020- Mathematicsthe relation between two numbers or amounts, with respect to the number of times the first contains the second:The ratio of 3 to 9 is the same as the ratio of 1 to 3.
- Mathematicsrate;
proportion:The ratio of acceptances to rejections is very high.
-ratio-,^{} root.
- -ratio- comes from Latin, where it has the meaning "logic;
reason;
judgment.'' This meaning is found in such words as: irrational, overrated, rate, ratify, ratio, ration, rational.
ra•tio^{}
(rā′shō, -shē ō′),USA pronunciation n., pl. -tios.
- Mathematicsthe 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.
- Mathematicsproportional relation;
rate:the ratio between acceptances and rejections. - [Finance.]the relative value of gold and silver in a bimetallic currency system.
- Latin ratiō a reckoning, account, calculation, derivative (see -tion) of the base of rērī to judge, think
- 1630–40
Collins Concise English Dictionary © HarperCollins Publishers::
ratio /ˈreɪʃɪˌəʊ/ n ( pl -tios)
'ratio' also found in these entries:
Bernoulli's theorem
- Boltzmann constant
- CR
- absolute humidity
- absorptance
- acceleration coefficient
- acid test ratio
- acoustic impedance
- albedo
- analogous
- analogy
- anamorphic lens
- angular magnification
- anharmonic ratio
- anode resistance
- antecedent
- aperture ratio
- arraign
- aspect ratio
- asymptotic
- average
- azeotrope
- ballistite
- bear
- bel
- birth rate
- block coefficient
- bulk modulus
- camber
- capacitance
- cephalic index
- change
- chronon
- clipper-built
- coefficient of restitution
- colon
- common ratio
- compressibility
- compression ratio
- compressor
- conductance
- consequent
- consonance
- continued proportion
- continuously variable transmission
- contrast
- conversion ratio
- correlation ratio
- cosecant
- cosine