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.

[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 …

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).

If you talk about the magnitude of something, you are talking about its great size, scale, or importance. An operation of this magnitude is going to be difficult.

Illustrated definition of Magnitude: The size of something. The magnitude of a number (also called its absolute value) is its distance from...

Mar 11, 2026 · Noun magnitude (countable and uncountable, plural magnitudes) (uncountable, countable) The absolute or relative size, extent or importance of something.