Definitions
1.NounThe absolute or relative size, extent or importance of something.
2.NounAn order of magnitude.
3.NounA number, assigned to something, such that it may be compared to others numerically
4.NounOf a vector, the norm, most commonly, the two-norm.
5.NounA logarithmic scale of brightness defined so that a difference of 5 magnitudes is a factor of 100.
The apparent brightness of a star, with lower magnitudes being brighter; apparent magnitude
A ratio of intensity expressed as a logarithm.
6.NounThe apparent brightness of a star, with lower magnitudes being brighter; apparent magnitude
7.NounA ratio of intensity expressed as a logarithm.
8.NounA measure of the energy released by an earthquake (e.g. on the Richter scale).