Definition of opportunistic

adj.1.taking immediate advantage, often unethically, of any circumstance of possible benefit; practising opportunism.
2.(Med.) Causing disease only when the immune system of the host has been weakened, or other damage to the host provides special opportunity for invasion; - of microorganisms or infectious diseases; as, opportunistic pathogens may infect a burn site; AIDS predisposes a patient to opportunistic infection.


Related Words

expedient, opportunist, timeserving


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