Definition of "fiend"

what God or Feend, or ſpirit of the earth,Or Monſter turned to a manly ſhape,Or of what mould or mettel he be made, […]

c. 1587–1588, [Christopher Marlowe], Tamburlaine the Great. […] The First Part […], 2nd edition, part 1, London: […] [R. Robinson for] Richard Iones, […], published 1592; reprinted as Tamburlaine the Great (A Scolar Press Facsimile), Menston, Yorkshire, London: Scolar Press, 1973, Act II, scene vi

Be that word our sign of parting, bird or fiend!

1845 February, — Quarles [pseudonym; Edgar Allan Poe], “The Raven”, in The American Review‎, volume I, number II, New York, N.Y., London: Wiley & Putnam, […]

At the confirmation ceremony the bishop would lay his hands on the child and tie around its forehead a linen band […] . This was believed to strengthen him against the assaults of the fiend […]

1971, Keith Thomas, Religion and the Decline of Magic, Folio Society, published 2012, page 35

Now the sign of the Lamb is a modern daub, not that which hung like a "banner on the outward wall," when the celebrated "cigar-fiend" used to haunt the hostelrie consuming incredible quantities of the best Havanas.

1837 May 27, “The Poor Gentleman”, in New-York Mirror‎, volume 14, number 48, New York City: [G.P. Morris], page 377

You could hear him putting away his crumby toilet articles and all, and opening the window. He was a fresh-air fiend.

1951, J. D. Salinger, The Catcher in the Rye, Little, Brown and Company, page 64

I play it off, but I'm dreaming of you / And I'll try to keep my cool, but I'm fiendin'

1999, Macy Gray, Jeremy Ruzumna, Jinsoo Lim, David Wilder (lyrics and music), “I Try”

I am back in San Francisco at the Clift Hotel, fiending for my fix.

2011, Emma J. Stephens, For a Dancer: The Memoir