definitions

active immunity

noun Immunology.

immunity in an organism resulting from its own production of antibody or lymphocytes.

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Nearby words

active congestion, active duty, active galactic nucleus, active galaxy, active hyperemia, active immunity, active layer, active list, active margin, active mass, active matrix
Compare passive immunity.

Origin of active immunity

First recorded in 1910–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for active immunity

active immunity

n.

Immunity resulting from the development of antibodies in response to the presence of an antigen, as from vaccination or exposure to an infectious disease.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for active immunity

active immunity

See under acquired immunity.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.