01 adj. taking immediate advantage, often unethically, of any circumstance of possible benefit; practising opportunism.
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1.
taking immediate advantage, often unethically, of any circumstance of possible benefit; practising opportunism.
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2.
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.(Med.)
Syn.
opportunist, timeserving.