Designating a diabolic or demonic being or agent. Now only in nicknames for the Devil, esp. in foul fiend (see also the foul ghost, foul thief, n.).

Demonic, devilish. Cf. demoniatic, adj.

Of or relating to a demon or demons; of the nature of or characteristic of a demon; demonic.

= demoniacal, adj. (in various senses). rare after 16th cent.

Of or relating to a demon or demons; of the nature of a demon; = demoniac, adj. 2. In early use also: †that worships demons (obsolete).

Of or relating to a demon or demons; of the nature of a demon; = demoniacal, adj. 2.

Of or relating to demons or a demon; of the nature of a demon. Also: of, relating to, or caused by demonic possession. Cf. demoniac, adj. 1 2.

Of or relating to a demon; of the nature of or characteristic of a demon; demonic.

Of or relating to a demon or demons; of the nature of a demon; demonic.

In South Asia: a female demon or devil; (hence) a spring whirlwind. Cf. devil, n. 12.

Demonic, devilish. Cf. demoniat, adj.

Of the nature of or characteristic of a demon; malevolent, fiendish, evil; (also) mischievous. Now somewhat rare.