Pronunciation: (rā'shō, -shē-ō"), [key]
1. 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.
2. proportional relation; rate: the ratio between acceptances and rejections.
3. Finance.the relative value of gold and silver in a bimetallic currency system.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.