The definition of homogenous is all the same.(adjective)
When everyone in a group looks, talks and dresses the same, this is an example of a group that would be described as homogenous.
See homogenous in Webster's New World College Dictionary
Origin: homo- + -genous
See homogenous in American Heritage Dictionary 4
Origin: Alteration of homogeneous (probably influenced by homogenize).
Learn more about homogenous