- The definition of improbable is something unlikely to happen or unlikely to be true.
- The idea that the sun spins around the Earth is an example of something that would be described as a improbable idea.
- When they are calling for a 90 percent chance of rain, this is an example of a time when sunshine is improbable.
improbable definition by Webster's New World
not probable; not likely to happen or be true; unlikely
Origin: Classical Latin improbabilis
improbable definition by American Heritage Dictionary
Unlikely to take place or be true.
- im·probˈa·ble·ness noun
- im·probˈa·bly adverb