noun, plural ac·tiv·i·ties.
- the number of atoms of a radioactive substance that disintegrate per unit of time, usually expressed in curies.
Origin of activity
Related Words for activitiesaction, life, enterprise, exercise, movement, task, work, project, job, venture, act, endeavor, scheme, exertion, motion, labor, liveliness, animation, bustle, hustle
Examples from the Web for activities
Contemporary Examples of activities
In one of the activities men practiced putting the dolls gingerly on their backs to carry them.How Good Dads Can Change the World
Gary Barker, PhD, Michael Kaufman
January 6, 2015
Jacob Cordova, 27, is the latest activist to be jailed for their activities.Texas Gun Slingers Police the Police—With a Black Panthers Tactic
January 2, 2015
The majority of the questions they asked were related to my work and activities.A Daughter’s Plea: Free My Father from Prison in Iran
Mitra Pourshajari, Movements.Org, Advancing Human Rights
December 26, 2014
Activities and clubs (5%): Student clubs and organizations nbsp;(2.5%, U.S. News); best student centers (2.5%, Niche).The Daily Beast College Rankings Methodology
November 5, 2014
But a full accounting of the activities of politicians before Maidan is not in the cards for now, says Rondin.Ukraine’s Wild and Wooly Elections
October 24, 2014
Historical Examples of activities
Of Rouquet's activities as an artist in England there are scant particulars.De Libris: Prose and Verse
Among my other activities, I wired the parlor for electric light.K
Mary Roberts Rinehart
I followed him about while he arranged for the termination of the day's activities.
Barbara was helping him, at least she called her activities "helping."Shavings
Joseph C. Lincoln
They discussed the village and the people in it and the church and its activities.Kent Knowles: Quahaug
Joseph C. Lincoln
noun plural -ties
- the capacity of a substance to undergo chemical change
- 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
in schoolwork sense, 1923, American English, from activity.
c.1400, "active or secular life," from Old French activité, from Medieval Latin activitatem (nominative activitas), a word in Scholastic philosophy, from Latin activus (see active). Meaning "state of being active, briskness, liveliness" recorded from 1520s; that of "capacity for acting on matter" is from 1540s.