Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Indistinguishable \In`dis*tin"guish*a*ble\ ([i^]n`d[i^]s*t[i^][ng]"gw[i^]sh*[.a]*b'l), a. Not distinguishable; not capable of being perceived, known, or discriminated as separate and distinct; hence, not capable of being perceived or known; as, in the distance the flagship was indisguishable; the two copies were indisguishable in form or color; the difference between them was indisguishable.
Douglas Harper's Etymology Dictionary
c.1600, from in- (1) "not, opposite of" + distinguishable. Related: Indistinguishably.
Wiktionary
a. 1 Not distinguishable; not capable of being perceived, known, or discriminated as separate and distinct 2 Not capable of being perceived or known.
WordNet
adj. 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]
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] [ant: distinguishable]
Usage examples of "indistinguishable".
Evne go up in smoke, and the black man who had kissed him turn black indeed, indistinguishable from his brother, and so on with all the other dots.
To suggest the unity of man and marble, the heads and the blocks being thrown would be indistinguishable.
Crew and passengers became almost indistinguishable, and even Nnanji at times donned a breechclout and ran aloft with the others.
Josh pointed to another area of dense vines, almost indistinguishable from the rest until Deadeye made out the barely visible gray of a rock wall behind it.
He led them quickly through three other halls of gates, all indistinguishable from that one.
Grandpapa must indeed have been besotted with Grandmama, she thought, smiling, to have given her so many and such ostentatious jewels, many of the glittering pieces almost indistinguishable from one another.
I also became acutely aware of the sometimes precarious, indistinguishable line between lawbreakers and lawmen.
Its interface was the best money could build: a realspace-interactive multiuser quantum simulation that was, for almost any imaginable purpose, indistinguishable from the real thing.
In his worn coat and seaboots, he was indistinguishable from any other fisherman.
The Deja Usenet search technology, programming code, and systems are inextricable and almost indistinguishable from the Usenet archive itself.
Their accounts, most of which were easily elicited, were almost indistinguishable from the accounts that self-described abductees present.
Clinton administrations the two groups were virtually indistinguishable.
Mexican Spanish with an accent indistinguishable from that of the man, and at least Cleta and Dionie could speak easily in the new language.
Between junior and real college, Barry Zito refines the delivery of his curveball to the point where it is indistinguishable, as it leaves his hand, from his otherwise uninteresting fastball.
She chooses a packet then, invokes a mirror program from her toolkit, watches it spin an identical image around herself, so that she sinks into the datastream, indistinguishable from the data around her.