Noah Webster's New International Dictionary of the English Language
1. (v. t.) To mix or mingle together; esp. to mingle, combine, or associate so that the separate things mixed, or the line of demarcation, can not be distinguished. Hence: To confuse; to confound.
2. (v. t.) To pollute by mixture or association; to spoil or corrupt; to blot; to stain.
3. (v. i.) To mingle; to mix; to unite intimately; to pass or shade insensibly into each other, as colors.
4. (n.) A thorough mixture of one thing with another, as color, tint, etc., into another, so that it cannot be known where one ends or the other begins.
5. (v.) To make blind, literally or figuratively; to dazzle; to deceive.