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

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 …

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).

[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 …

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

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

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.