- (of a microorganism) causing disease only under certain conditions, as when a person's immune system is impaired.
- (of a disease or infection) caused by such an organism: Pneumocystis pneumonia is an opportunistic disease that often strikes victims of AIDS.
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OTHER WORDS FROM opportunisticop·por·tun·is·ti·cal·ly, adverbun·op·por·tun·is·tic, adjective
WORDS THAT MAY BE CONFUSED WITH opportunisticopportune, opportunistic
Example sentences from the Web for opportunistic
The government also fixed the price of face masks to prevent opportunistic vendors from price gouging.These Asian countries have masterfully limited COVID outbreaks. Here’s how they did it|Naomi Xu Elegant|December 28, 2020|Fortune
To be sure, America’s own approach to global democracy has largely been opportunistic.
We now have more capital than we anticipated, [which will] allow us to opportunistically build what we have not been able to do.
We must go at it seriously and scientifically and solidly, not superficially, casually, and opportunistically.