Malignant1. (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.
Thesaurus Entries
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