The meaning of MAGNITUDE is great size or extent. How to use magnitude in a sentence.

[uncountable] (formal) the great size or importance of something; the degree to which something is large or important. We did not realize the magnitude of the problem. They appear to underestimate the …

Magnitude is also a measure of the brightness of a star as it appears from earth.

In math, magnitude compares numbers by powers of 10. If your weekly allowance was $10, but your brother's was $100, his allowance would be one order of magnitude higher than yours.

Dec 24, 2025 · magnitude (countable and uncountable, plural magnitudes) (uncountable, countable) The absolute or relative size, extent or importance of something. quotations

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.

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

Values are measured by eye (visual magnitude) or more accurately by photometric or photographic methods, and range from –26.7 (the sun), through 1.5 (Sirius), down to about +30.