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activity

[ ak-tiv-i-tee ]
/ ækˈtɪv ɪ ti /
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See synonyms for: activity / activities on Thesaurus.com

noun, plural ac·tiv·i·ties.
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Origin of activity

First recorded in 1520–30; from Middle French or directly from Medieval Latin āctīvitās; see active, -ity

OTHER WORDS FROM activity

non·ac·tiv·i·ty, noun, plural non·ac·tiv·i·ties.pre·ac·tiv·i·ty, noun, plural pre·ac·tiv·i·ties.su·per·ac·tiv·i·ty, noun, plural su·per·ac·tiv·i·ties.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use activity in a sentence

British Dictionary definitions for activity

activity
/ (ækˈtɪvɪtɪ) /

noun plural -ties
the state or quality of being active
lively action or movement
any specific deed, action, pursuit, etcrecreational activities
the number of disintegrations of a radioactive substance in a given unit of time, usually expressed in curies or disintegrations per second
  1. the capacity of a substance to undergo chemical change
  2. the effective concentration of a substance in a chemical system. The absolute activity of a substance B, λ B, is defined as exp (μ B RT) where μ B is the chemical potential
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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