indistinguishable

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

Synonyms of indistinguishable

• invisible
• imperceptible
• subtle

Examples of indistinguishable in a Sentence

indistinguishable differences that can be measured only electronically

indistinguishable shapes in the fog

Recent Examples on the Web

The film industry is already at a tipping point in which the digital and the physical are becoming indistinguishable. —Eva Roytburg, Fortune, 19 Feb. 2026

Going by their customer relationship management (CRM) systems, their processes looked indistinguishable. —Rohan Narayana Murty, Harvard Business Review, 18 Feb. 2026

Through a rigorous multibarrier treatment process, the system produces drinking water that meets or exceeds all state and federal standards and is indistinguishable in quality from Aurora’s traditional mountain water supplies. —Mike Coffman, Denver Post, 10 Feb. 2026

Generic Large Nylon Tote Bag The first bag on this list is nearly indistinguishable from the iconic Le Pliage, from the gold hardware, to the canvas fabric, down to the contrast stitching on the handles. —Amelia McBride, Travel + Leisure, 30 Jan. 2026

Word History

First Known Use

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