Difficult to believe; not plausible.
Distantly related by blood or marriage:
Not likely; improbable.
Open to doubt or challenge; problematic.
Small in amount, degree, or extent; slight; scant; meager
Capable of happening but of uncertain likelihood:
The definition of plausible is something that is highly likely.
Appearing as such; being such in appearance; professed, supposed (rather than demonstrably true or real).
Capable of eliciting belief or trust.
Not suitable or appropriate.
The definition of flimsy is something which is lacking in strength or thin and easily broken.
So implausible as to elicit disbelief; unbelievable:
Not dependable or reliable; questionable
Having little bodily flesh or fat; lean or slender.
Not solid or heavy; flimsy; light
Lacking persuasiveness; unconvincing:
Very good; fine; splendid
Exciting wonder or surprise; astonishing; wonderful.
Find another word for improbable. In this page you can discover 36 synonyms, antonyms, idiomatic expressions, and related words for improbable, like: doubtful, probable, implausible, remote, not to be expected, unlikely, farfetched, inconceivable, questionable, slim and unbelievable.