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

Medical Dictionary

activity

play
noun ac·tiv·i·ty \ak-ˈtiv-ət-ē\

Medical Definition of activity

plural activities

  1. 1:  natural or normal function: asa:  a process (as digestion) that an organism carries on or participates in by virtue of being aliveb:  a similar process actually or potentially involving mental function; specifically :  an educational procedure designed to stimulate learning by firsthand experience

  2. 2:  the characteristic of acting chemically or of promoting a chemical reaction <the activity of a catalyst>





Seen and Heard

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

WORD OF THE DAY

a division or portion of a pool or whole

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1926873504

Which of the following best describes an easily irritated person?

flashy tetchy superficial gregarious
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