A rough calculation or assessment of the value, size, or cost of something.
A document (or verbal notification) specifying how much a job is likely to cost.
An upper limitation on some positive quantity.
To judge and form an opinion of the value of, from imperfect data.
To calculate roughly, often from imperfect data.
A calculation of an estimate of the value of some function outside the range of known values.
The diametric opposite of interpolation.
An inference about some hypothetical situation based on known facts.