<p><strong>Verb</strong></p><ul><li>(used with object)<ul><li>To infer (an unknown) from something that is known; conjecture.</li><li>To estimate (the value of a variable) outside the tabulated or observed range.</li><li>To estimate (a function that is known over a range of values of its independent variable) to values outside the known range.</li></ul></li><li>(used without object)<ul><li>To perform extrapolation.</li></ul></li></ul>