Definitions
1.noun(usually pluralized) Something which has exactly the same properties as something else.
2.nounAn identical twin.
3.adjectiveBearing full likeness by having precisely the same set of characteristics; indistinguishable.
4.adjectiveNot different or other; not another or others; not different as regards self; selfsame; numerically identical.
5.adjectiveOf twins, sharing the same genetic code.
6.adjectiveExactly equivalent.
7.adjectiveApproximating or approaching exact equivalence.