not capable of being distinguished or differentiated; the two specimens are actually different from each other but the differences are almost indistinguishable; the twins were indistinguishable; a colorless person quite indistinguishable from the colorless mass of humanity

[ Syn: undistinguishable ]

exactly alike; incapable of being perceived as different; rows of identical houses; cars identical except for their license plates; they wore indistinguishable hats

[ Syn: identical ]