Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Language: Latin
Origin: extra ( EXTRA-) + English -polate (as in interpolate)

extrapolate

 verb
     
ex‧trap‧o‧late [intransitive and transitive]
to use facts about the present or about one thing or group to make a guess about the future or about other things or groups
extrapolate (something) from something
It is possible to extrapolate future developments from current trends.
You're extrapolating from your own feelings to mine.
extrapolate (something) to something
These results cannot, however, be extrapolated to other patient groups.
—extrapolation noun [uncountable and countable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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