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.
The absolute or relative size, extent or importance of something.
A measure of the energy released by an earthquake (e.g. on the Richter scale).
A number, assigned to something, such that it may be compared to others numerically
An order of magnitude.
Of a vector, the norm, most commonly, the two-norm.
The apparent brightness of a star, with lower magnitudes being brighter; apparent magnitude
A ratio of intensity expressed as a logarithm.