1. (a.) Disposed to do harm, inflict suffering, or cause distress; malicious; as, a malignant tumor\.

2. (a.) Characterized or caused by evil intentions; pernicious.

3. (a.) Tending to produce death; threatening a fatal issue; virulent; as, malignant diphtheria.

4. (n.) A man of extreme enmity or evil intentions.

5. (n.) One of the adherents of Charles L. or Charles LL.; -- so called by the opposite party.

acrid allergic anemic antagonistic antipathetic apoplectic arthritic atrocious baleful baneful barbaric barbarous belligerent bestial bilious bitchy bitter bloody brutal brutish cancerous catching caustic chlorotic clashing colicky colliding communicable conflicting consumptive contagious corroding corrosive corrupting corruptive counterproductive cussed damaging deadly death-bringing deathful deathly deleterious despiteful destructive detrimental devilish diabolical disadvantageous disserviceable distressing dropsical dyspeptic edematous encephalitic envenomed epileptic evil fatal feral ferine ferocious fiendish fierce full of hate harmful hateful hostile hurtful infectious infective inhuman iniquitous injurious internecine invidious kill-crazy killing laryngitic leprous lethal luetic malarial malefic maleficent malevolent malicious malign mean measly mephitic merciless miasmal miasmatic miasmic mischievous mortal murderous nasty nephritic neuralgic neuritic noisome noncivilized noxious ominous ornery palsied paralytic pernicious pestiferous pestilential phthisic pitiless pleuritic pneumonic pocky podagric poisonous prejudicial quarrelsome rachitic rancorous repugnant rheumatic rickety ruthless sanguinary savage scatheful scorbutic scrofulous set against sore spiteful tabetic tabid tameless toxic toxicant toxiferous tubercular tuberculous tumorigenic tumorous uncivilized ungentle untamed venenate veneniferous venenous venomous vicious virulent vitriolic wicked wild