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Definitions

questionable

[kwes-chuh-nuh-buhl] / ˈkwɛs tʃə nə bəl /
ADJECTIVE
doubtful, uncertain
Synonyms
STRONGEST
ambiguous arguable controversial debatable dubious problematic suspicious unproven vague
WEAK
apocryphal contingent controvertible cryptic disputable dubitable enigmatic equivocal fishy hard to believe hypothetical iffy indecisive indefinite indeterminate moot mysterious obscure occult open to doubt open to question oracular paradoxical problematical provisional shady suspect unconfirmed undefined under advisement under examination unreliable unsettled
Antonyms
STRONGEST
certain clear definite incontrovertible indubious sure trustworthy trusty undoubted unquestionable
WEAK
indisputable proven

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Today’s lawmakers looking for a frame of reference may want to read up on the efforts to regulate a questionable trading platform of an earlier era, the “bucket shop.”

From Barron's • Apr. 7, 2026

Its director’s past actions are more than questionable.

From Salon • Apr. 3, 2026

Now 41, the league’s new leader in regular-season and playoff wins was questionable to play in his second game in as many nights while managing left foot arthritis.

From Los Angeles Times • Apr. 1, 2026

Instead, Sands sees them loading up on bitcoin, backing niche dental-technology companies and pouring money into questionable real-estate ventures.

From The Wall Street Journal • Mar. 26, 2026

"And that is the most questionable statement of all," Tobitt said.

From "Invisible Man" by Ralph Ellison

Vocabulary lists containing questionable

"The Tragedy of Hamlet," Vocabulary from Act 1

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