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

infection

play
noun in·fec·tion \in-ˈfek-shən\

Simple Definition of infection

  • : the act or process of infecting someone or something : the state of being infected

  • : a disease caused by germs that enter the body

Source: Merriam-Webster's Learner's Dictionary

Full Definition of infection

  1. 1 :  the act or result of affecting injuriously

  2. 2 :  an infective agent or material contaminated with an infective agent

  3. 3 a :  the state produced by the establishment of an infective agent in or on a suitable host b :  a disease resulting from infection

  4. 4 :  an act or process of infecting; also :  the establishment of a pathogen in its host after invasion

  5. 5 :  the communication of emotions or qualities through example or contact

Examples of infection in a sentence

  1. Poor hygiene can increase the danger of infection.

  2. The wound has so far remained free of infection.

  3. steps you can take to decrease your computer's risk of infection



14th Century

First Known Use of infection

14th century


INFECTION Defined for Kids

infection

play
noun in·fec·tion \in-ˈfek-shən\

Definition of infection for Students

  1. 1 :  the act or process of passing on or introducing a germ, illness, or disease to :  the state of being infected

  2. 2 :  any disease caused by germs <an ear infection>




Medical Dictionary

infection

play
noun in·fec·tion \in-ˈfek-shən\

Medical Definition of infection

  1. 1:  an infective agent or material contaminated with an infective agent

  2. 2a:  the state produced by the establishment of an infective agent in or on a suitable hostb:  a disease resulting from infection :  infectious disease

  3. 3:  an act or process of infecting <syphilis infection is chiefly venereal>; also :  the establishment of a pathogen in its host after invasion





Seen and Heard

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

WORD OF THE DAY

to eat gluttonously or ravenously

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

oily prompt maudlin angry
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