1.nounThat which distinguishes; a single occurrence of a determining factor or feature, the fact of being divided; separation, discrimination.
2.nounThe act of distinguishing, discriminating; discrimination.
"There is a distinction to be made between resting and slacking."
3.nounSpecifically, a feature that causes someone or something to stand out as being better; a mark of honour, rank, eminence or excellence; being distinguished.