Satan is the Devil.(noun)
Lucifer is an example of Satan.
See Satan in Webster's New World College Dictionary
Origin: ME < OE < LL(Ec) < Gr(Ec) < Heb satan, adversary, prob. < śṭn, to be adverse, plot against
See Satan in American Heritage Dictionary 4
Origin: Middle English
Origin: , from Old English
Origin: , from Late Latin Satān
Origin: , from Greek Satanas, Satān
Origin: , from Hebrew śāṭān, devil, adversary
Origin: , from śāṭan, to accuse, act as adversary; see śṭn in Semitic roots.
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