Synonyms of indefinite

indefinite

adjective

(ˌ)in-ˈde-fə-nət 

1

as in infinite

being or seeming to be without limits

the indefinite vastness of the frozen tundra

Synonyms & Similar Words

• infinite
• endless
• unlimited
• limitless
• vast
• boundless
• immeasurable
• illimitable
• measureless
• unbounded
• fathomless
• unfathomable
• horizonless
• extensive
• immense
• immensurable
• bottomless
• innumerable
• incalculable
• inexhaustible
• countless
• unmeasured
• inestimable
• abysmal
• incomputable
• exhaustless
• far-flung

Antonyms & Near Antonyms

• limited
• definite
• finite
• confined
• restricted
• circumscribed
• bounded
• measurable
• superficial
• shallow
• fathomable
• depthless

2

as in vague

not expressed in precise terms

an indefinite longing for something new and exciting in her life

Synonyms & Similar Words

• vague
• unclear
• ambiguous
• fuzzy
• cryptic
• inexplicit
• confusing
• obscure
• enigmatic
• indeterminate
• nebulous
• uncertain
• undefined
• unintelligible
• muzzy
• equivocal
• indistinct
• undetermined
• hazy
• murky
• faint
• blurry
• inexplicable
• mysterious
• dim
• dark
• foggy
• misty
• undefinable
• indistinguishable
• inscrutable
• perplexing
• bleary
• baffling
• puzzling
• unfathomable
• woozy
• confounding
• gauzy
• bewildering
• mystifying
• obfuscatory

Antonyms & Near Antonyms

• definite
• specific
• explicit
• clear
• direct
• open
• straight
• obvious
• frank
• unambiguous
• unequivocal
• outspoken
• straightforward
• honest
• plain
• candid
• forthright
• understandable
• unguarded
• distinct
• intelligible
• comprehensible
• defined
• openhearted
• plainspoken
• unmistakable
• foursquare
• blatant
• patent
• fathomable
• well-defined

3

as in faint

not seen or understood clearly

through the dense fog we could just barely discern the indefinite form of another boat

Synonyms & Similar Words

• vague
• faint
• hazy
• undefined
• nebulous
• undetermined
• indistinct
• unclear
• fuzzy
• pale
• obscure
• shadowy
• dim
• blurry
• dark
• opaque
• murky
• indistinguishable
• foggy
• misty
• blear
• bleary
• dusky
• invisible
• intangible
• gauzy
• gloomy
• mysterious
• inexplicable
• incomprehensible
• impalpable
• puzzling
• inappreciable
• indiscernible
• hieroglyphic
• indecipherable
• obfuscatory

Antonyms & Near Antonyms

• definite
• clear
• distinct
• certain
• obvious
• evident
• plain
• pellucid
• bright
• strong
• sure
• firm

Example Sentences

Recent Examples of indefinite

In the meantime, posting online brings the risk of having jokes ripped off not just once, but an indefinite amount of times, across accounts, and by all kinds of different bots. — Matt Grobar, Deadline, 16 Oct. 2026

Encryption does not justify unnecessary collection, indefinite retention or intrusive profiling. — Expert Panel®, Forbes.com, 16 Oct. 2026

But an indefinite moratorium removes an important governance tool. — Claire Malon, Chicago Tribune, 8 Oct. 2026

Now the closure, like Russia’s war against Ukraine itself, has become indefinite. — Scott Peterson, Christian Science Monitor, 7 Oct. 2026