The Britannica Dictionary
mobile search
Home
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
×
Britannica Homepage
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
The Britannica Dictionary
immune system
1 ENTRIES FOUND:
immune system
(noun)
immune system
noun
plural
immune systems
immune system
noun
plural
immune systems
Britannica Dictionary definition of IMMUNE SYSTEM
[
count
]
:
the system that protects your body from diseases and infections
a strong/healthy
immune system
[+] more examples
[-] hide examples
[+] Example sentences
[-] Hide examples
ASK THE EDITOR
How is the
-ed
part of a verb pronounced?
See the answer »
QUIZZES
Vocabulary Quiz
Test your word power
Take the Quiz »
Name That Thing
Take our visual quiz
Test Your Knowledge »
WORD OF THE DAY
judgment
:
an opinion or decision that is based on careful thought
Learn More »