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1The action of estimating or concluding something by assuming that existing trends will continue or a current method will remain applicable.
‘sizes were estimated by extrapolation’
‘caution is advised in the interpretation and extrapolation of results’
count noun‘the figure is an extrapolation from prior data’
‘There are so many minor but questionable extrapolations and speculations as to divert even the sympathetic reader away from his greater historical aims.’
‘I would be very cautious with such extrapolations.’
‘An extrapolation of current trends clearly indicates the need for fundamental changes in the structure of supercomputing systems in the future.’
‘Given that many economists have a difficult time identifying turning points in economic activity, perhaps it is not unreasonable for most people to rely on trend extrapolation.’
‘Any such extrapolation based on one incident only is a most unscientific and unreliable basis for projections.’
‘Such wild extrapolation is not in keeping with the news standards of the New York Times.’
‘These ideas, their precursors, their extrapolations and their interpretations have been repeatedly turned over during the last 120 years.’
‘Its projections are not forecasts but extrapolations of present trends.’
‘As a scientist I'd need more detail before making an extrapolation.’
‘Much of this is based on speculative extrapolation.’
1.1Mathematics The extension of a graph, curve, or range of values by inferring unknown values from trends in the known data.
‘extrapolation of the logarithmic curve yielded an estimate of 66 species’
‘She was concerned that this figure of 6 .8 million was derived solely from mathematical extrapolations.’
‘The extrapolation from any data set to the whole genome will be plagued by possible biases in representation until the two respective genomes are sequenced and annotated.’
‘We should not make unwarranted extrapolations of simulation results to real sequence data.’
‘Extrapolation of the curve of viscosity vs temperature gives a figure for temperature of 13 °C.’
‘This estimate is between the linear and linear quadratic extrapolations from data on A bomb survivors.’
‘Therefore, it is not possible to estimate by extrapolation the O 2 concentration in the water resulting in anoxia in the lacunae.’
‘The calibration for 730 nm was obtained by extrapolation from the calibration graph.’
‘Some information on density is available from laboratory experiments; other data must be estimated by extrapolation.’
‘Linear extrapolation was used to define reference values in children above 8.’