Magnitude definition: size; extent; dimensions.. See examples of MAGNITUDE used in a sentence.

Definition of magnitude noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Magnitude is also a measure of the brightness of a star as it appears from earth. The magnitude of an earthquake is a measure of how strong or violent it is. The magnitudes of the …

In mathematics, the magnitude or size of a mathematical object is a property which determines whether the object is larger or smaller than other objects of the same kind.

A star’s brightness measured as either absolute magnitude or apparent magnitude. The latter states brightness in the sky on a scale from -26.8 (the Sun, brightest) to +25 (the faintest).

Magnitude is used in stating the size or extent of something such as a star, earthquake, or explosion.

There are nine meanings listed in OED's entry for the noun magnitude, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Look up magnitude in Wiktionary, the free dictionary. Limiting magnitude, the faintest apparent magnitude of a celestial body that is detectable or detected by a given instrument.

6 days ago · Explore how earthquake magnitude is measured, comparing the Richter scale and moment magnitude, with insights on seismic intensity and accurate magnitude comparison for …

Oct 10, 2025 · magnitude (countable and uncountable, plural magnitudes) (uncountable, countable) The absolute or relative size, extent or importance of something. quotations