A devil or demon. A very bad person.
A fanatic.
An addict.
A wizard. As in a perl fiend.

Fiend (?), n. [OE. fend, find, fiend, feond, fiend, foe, AS. feond; akin to OS. fiond, D. vijand enemy, OHG. fiant, G. feind, Icel. fjand, Sw. & Dan. fiende, Goth. fijands; orig. p.pr. of a verb meaning to hate, AS. feon, feogan, OHG. fin, Goth. fijan, Skr. piy to scorn; prob. akin to E. feud a quarrel. 81. Cf. Foe, Friend.]

An implacable or malicious foe; one who is diabolically wicked or cruel; an infernal being; -- applied specifically to the devil or a demon.

Into this wild abyss the wary fiend Stood on the brink of Hell and looked a while. Milton.

O woman! woman! when to ill thy mind Is bent, all hell contains no fouler fiend. Pope.

 

© Webster 1913.

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