Definition of Lucifer
1 —used as a name of the devil
2 : the planet Venus when appearing as the morning star
3 not capitalized : a friction match having as active substances antimony sulfide and potassium chlorate
From the M-W Editors
Examples of lucifer in a Sentence
Lucifer is depicted as a powerful but proud angel who leads a revolt against heaven.
Origin and Etymology of lucifer
Middle English, the morning star, a fallen rebel archangel, the Devil, from Old English, from Latin, the morning star, from lucifer light-bearing, from luc-, lux light + -fer -ferous — more at light
First Known Use: before 12th century
LUCIFER Defined for English Language Learners
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