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5 definitions found
 for malignant
From The Collaborative International Dictionary of English v.0.48 :

  Invasive \In*va"sive\, a. [LL. invasivus: cf. F. invasif. See
     1. Tending to invade; characterized by invasion; aggressive.
        "Invasive war." --Hoole.
        [1913 Webster]
     2. (Med.) tending to spread, especially tending to intrude
        into healthy tissue; -- used mostly of tumors. [Narrower
        terms: malignant] PJC]

From The Collaborative International Dictionary of English v.0.48 :

  malignant \ma*lig"nant\, a. [L. malignans, -antis, p. pr. of
     malignare, malignari, to do or make maliciously. See
     Malign, and cf. Benignant.]
     1. Disposed to do harm, inflict suffering, or cause distress;
        actuated by extreme malevolence or enmity; virulently
        inimical; bent on evil; malicious.
        [1913 Webster]
              A malignant and a turbaned Turk.      --Shak.
        [1913 Webster]
     2. Characterized or caused by evil intentions; pernicious.
        "Malignant care." --Macaulay.
        [1913 Webster]
              Some malignant power upon my life.    --Shak.
        [1913 Webster]
              Something deleterious and malignant as his touch.
        [1913 Webster]
     3. (Med.) Tending to produce death; threatening a fatal
        issue; virulent; as, malignant diphtheria.
        [1913 Webster]
     Malignant pustule (Med.), a very contagious disease
        produced by infection of subcutaneous tissues with the
        bacterium Bacillus anthracis. It is transmitted to man
        from animals and is characterized by the formation, at the
        point of reception of the infection, of a vesicle or
        pustule which first enlarges and then breaks down into an
        unhealthy ulcer. It is marked by profound exhaustion and
        often fatal. The disease in animals is called charbon;
        in man it is called cutaneous anthrax, and formerly was
        sometimes called simply anthrax.
        [1913 Webster +PJC]

From The Collaborative International Dictionary of English v.0.48 :

  Malignant \Ma*lig"nant\, n.
     1. A man of extreme enmity or evil intentions. --Hooker.
        [1913 Webster]
     2. (Eng. Hist.) One of the adherents of Charles I. or Charles
        II.; -- so called by the opposite party.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

      adj 1: dangerous to health; characterized by progressive and
             uncontrolled growth (especially of a tumor) [ant:

From Moby Thesaurus II by Grady Ward, 1.0 :

  157 Moby Thesaurus words for "malignant":
     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

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