Definition of apparent magnitude in US English:
 apparent magnitude
nounəˈpɛrənt ˈmæɡnəˌt(j)ud
Astronomy The magnitude of a celestial object as it is actually measured from the earth.
Compare with absolute magnitude
 Example sentencesExamples
-  Having such a metric obviates a major analytic problem caused by discrete characters, which is that units of the same apparent magnitude are not necessarily equivalent.
 -  That is, it would be 84,000 times as faint as Quaoar, making its apparent magnitude + 30.8.
 -  Sol at - 26.74 apparent magnitude is the brightest star as seen from Earth.
 -  The resulting complete image with a million pixels would be as bright as the full Moon at apparent magnitude - 12.5.
 
 Synonyms
brightness, brilliance, radiance, luminosity