The definition of a confederacy is a union between people, states, nations or other groups for a common purpose.(noun)
An example of a confederacy is a number of households within a neighborhood forming a neighborhood watch program.
Confederacy refers to the group of eleven southern states within the U.S. that seceded from the United States from 1861 to 1865.(noun)
An example of confederacy is the Confederate States of America which included eleven states including Texas, Alabama and Georgia.
See confederacy in Webster's New World College Dictionary
See confederacy in American Heritage Dictionary 4
noun pl. con·fed·er·a·cies
Origin: Middle English confederacie
Origin: , from Anglo-Norman
Origin: , from Late Latin cōnfoederātiō, cōnfoederātiōn-, agreement
Origin: , from cōnfoederātus
Origin: , past participle of confoederāre, to unite; see Confederate.
Learn more about confederacy