Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

active immunity

noun

Definition of active immunity

  1. :  usu. long-lasting immunity that is acquired through production of antibodies within the organism in response to the presence of antigens — compare passive immunity



1895

First Known Use of active immunity

1895


Medical Dictionary

active immunity

noun

Medical Definition of active immunity

  1. :  usually long-lasting immunity that is acquired through production of antibodies within the organism in response to the presence of antigens—compare acquired immunity, innate immunity, passive immunity




Seen and Heard

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

WORD OF THE DAY

a feeling of fear that causes hesitation

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

august-macke-lady-in-a-green-jacket

Which of these is a synonym of namby-pamby?

lithe energetic insipid insightful
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ