opportunistic

play
adjective op·por·tu·nis·tic \ˌä-pər-tü-ˈni-stik, -tyü-\

Definition of opportunistic

  1. :  taking advantage of opportunities as they arise: such asa :  exploiting opportunities with little regard to principle (see principle 1) or consequences a politician considered opportunistic an opportunistic investmentb :  feeding on whatever food is available opportunistic feeders opportunistic bearsc :  being or caused by a usually harmless microorganism that can become pathogenic when the host's resistance is impaired opportunistic infections opportunistic diseases

opportunistically

play \ˌä-pər-tü-ˈni-sti-k(ə-)lē, -tyü-\ adverb

1892

First Known Use of opportunistic

1892


Medical Dictionary

opportunistic

play
adjective op·por·tu·nist·ic \-t(y)ü-ˈnis-tik\

Medical Definition of opportunistic

  1. 1:  of, relating to, or being a microorganism that is usually harmless but can become pathogenic when the host's resistance to disease is impaired

  2. 2:  of, relating to, or being an infection or disease caused by an opportunistic organism Pneumocystis carinii pneumonia and other opportunistic infections that kill AIDS patients—New York Times



Seen and Heard

What made you want to look up opportunistic? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

acid in temper, mood, or tone

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • peter-bruegel-tower-of-babel-painting
  • What language does pajama come from?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Syn City

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!