extrapolation

[ ik-strap-uh-ley-shuhn ]

noun

1. an act or instance of inferring an unknown from something that is known.
2. Statistics, Mathematics. the act or process of estimating the value of a variable or function outside the tabulated or observed range.

extrapolation

1. A mathematical procedure designed to enable one to estimate unknown values of a parameter from known values. A common method of extrapolation is to look at data on a curve, then extend the curve into regions for which there is no data. Extrapolation is often used to predict the future.

Word History and Origins

Origin of extrapolation¹

First recorded in 1870–75; extrapolat(e) + -(t)ion

Example Sentences

In one of his last interviews, John Lennon reminded legions of fans that when it comes to his work with The Beatles—and, by extrapolation, his solo efforts—the music will always be the thing that matters most.

From Salon

Smothermon has argued that Glossip’s defenders made an incorrect extrapolation.

From Slate

Yet the extrapolation some have made is startling; that slavery turned sprinters of West African descent into world beaters.

From BBC

We perhaps should not be surprised that the prime minister has seized upon an extrapolation of Thursday's local election results that pointed to the prospect that the general election could result in a hung parliament in which Labour would be the largest party.

From BBC

The film climaxes with Moscow’s incineration, the Master’s fantasy of revenge — a scene that is not in the novel but Lockshin believes is a fair extrapolation of Bulgakov’s intentions.

From Los Angeles Times

Related Words

• calculation
• estimate
• estimation
• forecast