From a novelist's perspective it is a "miraculous event", too improbable to be true.
The story of how an introverted German scientist came to judge and counsel schools around the world is an improbable one.
This improbable monster is largely a stunt to show green credentials (although since Rolls-Royce owners also tend to own big yachts and private jets, such concerns are hardly likely to bother them).
We are a people of improbable hope.
The improbable pregnancy was big news for the woman's family.
While it seems unbelievably improbable, with her track record, that the Predictor will predict wrongly for you, in fact it is not absolutely impossible.
"And then," said she, "if that very improbable event should ever take place, I shall merely be able to tell what Bingley may tell in a much more agreeable manner himself."
We must make one of two following highly improbable suppositions.
Upon Testing or logging in, several errors may occur (though if you followed this document, this is improbable).
If you take into account the warming trend of the past half century, however, the extraordinary heatwave starts to look less improbable: a once-in-a-century event, perhaps.
One way to cope with those emotions is to belittle warnings of a pandemic as improbable.
By 2003's The Da Vinci Code, Brown had clearly honed his pop-lit formulation of improbable plot twists, historical trivia and travelogue.
These great revolutionary barricades were assembling points for improbable was simple there. These men did not astonish each other.
It's improbable that she'll accept the invitation.
The wildlife trade has claimed a share of this improbable species, the Pseudoryx nghetinhensis , as they get caught in snares intended for more numerous animals, like the wild boar or deer.
As improbable as this sounds, it really works.
Next to them a body slumped in an improbable pose - curled, stiff, yet balanced, delicately, as if on the head of a pin.
It may sound improbable, but the secret to finding more time in yourday is spending more time in bed at night.