say it: RAY-shee-oh
ratio is a noun meaning "the relative magnitudes of two quantities (usually expressed as a quotient)". It carries 2 recorded senses.
the relative magnitudes of two quantities (usually expressed as a quotient)
the relation between things (or parts of things) with respect to their comparative quantity, magnitude, or degree
“an inordinate proportion of the book is given over to quotations”
“a dry martini has a large proportion of gin”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for ratio come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.