Extrapolate is defined as speculate, estimate or arrive at a conclusion based on known facts or observations.(verb)
An example of extrapolate is deciding it will take twenty minutes to get home because it took you twenty minutes to get there.
See extrapolate in Webster's New World College Dictionary
Origin: L extra (see extra-) + (inter)polate
See extrapolate in American Heritage Dictionary 4
verb ex·trap·o·lat·ed, ex·trap·o·lat·ing, ex·trap·o·lates verb, transitive
Origin: + (inter)polate.
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