To check or adjust by comparison with a standard.
To measure the caliber of a tube or gun.
To mark the scale of a measuring instrument.
To judge and form an opinion of the value of, from imperfect data.
To calculate roughly, often from imperfect data.
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.