Englishfor English speakers
background
Noun
—
The background is what can be seen or heard behind other things that are closer or louder.
I was talking to Mary, but I heard the phone ringing in the background.
The play was good, and I especially liked the backgrounds that were used.
—
The background of a person is his/her history.
The police checked his background to see if he had been in jail.
background
Verb
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To make a background.
luminosity
—
noun
(= light)
the quality of being luminous; emitting or reflecting light
its luminosity is measured relative to that of our sun