1. (n.) Importance; greatness; size; as, the magnitude of an earthquake\.

2. (n.) That which has one or more of the three dimensions, length, breadth, and thickness.

3. (n.) Anything of which greater or less can be predicated, as time, weight, force, and the like.

4. (n.) Greatness; grandeur.

5. (n.) Greatness, in reference to influence or effect; importance; as, an affair of magnitude.

Beehive Cepheid variable Hertzsprung-Russell diagram Hyades Messier catalog NGC Pleiades Seven Sisters absolute magnitude amount ampleness amplitude area bigness binary star black hole body boundlessness breadth bulk caliber consequence coverage depth diameter dimension dimensions double star dwarf star enormity enormousness expanse expansion extension extent fixed star force formidableness fullness gauge giant star gigantism girth globular cluster grandeur grandness gravity star great scope greatness height hugeness immensity import importance infinity intensity largeness length main sequence star mass mass-luminosity law matter measure measurement might mightiness moment momentousness muchness neighborhood neutron star note nova numbers open cluster order pith plenitude populations power prodigiousness proportion proportions pulsar quantity quantum quasar quasi-stellar radio source radio star radius range reach red giant star relative magnitude scale scope significance signification size sky atlas spectrum-luminosity diagram spread star star catalog star chart star cloud star cluster stellar magnitude strength stupendousness substance sum supernova tour de force tremendousness tune variable star vastness vicinity volume weight weightiness white dwarf star whole width