indistinguishable

1 of 2

adjective

in·​dis·​tin·​guish·​able ˌin-di-ˈstiŋ-gwi-shə-bəl 

-ˈstiŋ-wi-

: not distinguishable: such as

a

: lacking identifying or individualizing qualities

seemingly indistinguishable alternatives

The copy is practically indistinguishable from the original.

b

: not clearly recognizable or understandable

indistinguishable differences

c

: indeterminate in shape or structure

indistinguishable forms in the mist

indistinguishability

ˌin-di-ˌstiŋ-gwi-shə-ˈbi-lə-tē 

-ˌstiŋ-wi-

noun

indistinguishableness

ˌin-di-ˈstiŋ-gwi-shə-bəl-nəs 

-ˈstiŋ-wi-

noun

indistinguishably

ˌin-di-ˈstiŋ-gwi-shə-blē 

-ˈstiŋ-wi-

adverb

indistinguishability

2 of 2

noun

in·​distinguishability ¦in+ 

: the quality or state of being indistinguishable

Synonyms of indistinguishable

Adjective

• invisible
• imperceptible
• subtle

Examples of indistinguishable in a Sentence

Adjective

indistinguishable differences that can be measured only electronically

indistinguishable shapes in the fog

Recent Examples on the Web

Adjective

The language employed is indistinguishable from the author’s vision. — Peter Rainer, Christian Science Monitor, 15 July 2026

In its final form, a CPN chapter was visually indistinguishable from a haiku, the white space between words packed tightly with meaning. — Literary Hub, 13 July 2026

The agent's output, grounded in model predictions rather than raw metrics, beat the baseline on every dimension physicians scored, and its ratings were statistically indistinguishable from summaries built on actual ground truth. — Josipa Majic Predin, Forbes.com, 10 July 2026

Even his writing is almost indistinguishable from his speech. — Rose Horowitch, The Atlantic, 8 July 2026

Word History

First Known Use

Adjective

1606, in the meaning defined above

Rhymes for indistinguishable

• distinguishable
• inextinguishable
• undistinguishable

Kids Definition

indistinguishable

adjective

in·​dis·​tin·​guish·​able ˌin-dis-ˈtiŋ-gwish-ə-bəl 

: impossible to distinguish clearly