1. The relative magnitudes of two quantities (usually expressed as a quotient)
   "The ratio of boys to girls in the class was 3:2"
    
2. The relation between things (or parts of things) with respect to their comparative quantity, magnitude, or degree
   "an inordinate ratio of the book is given over to quotations";
   - proportion

Derived forms: ratios

Type of: magnitude relation, quantitative relation

Encyclopedia: Ratio, Arkansas