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
Examples from the Web for activities
In one of the activities men practiced putting the dolls gingerly on their backs to carry them.
Jacob Cordova, 27, is the latest activist to be jailed for their activities.Texas Gun Slingers Police the Police—With a Black Panthers Tactic|Brandy Zadrozny|January 2, 2015|DAILY BEAST
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|DAILY BEAST
Activities and clubs (5%): Student clubs and organizations nbsp;(2.5%, U.S. News); best student centers (2.5%, Niche).
But a full accounting of the activities of politicians before Maidan is not in the cards for now, says Rondin.
The public library is to be the center of all the activities that make for social efficiency.Why do we need a public library?|Various
It is to ascertain the meaning of present activities and to secure, so far as possible, a present activity with a unified meaning.Human Nature and Conduct|John Dewey
You also found out that people from the mansion were interested in your activities, but didn't want to be seen.The Flying Stingaree|Harold Leland Goodwin
The individual's activities were closely watched by security police or other Party watchdogs.Area Handbook for Albania|Eugene K. Keefe
Of course he had made a report of the day's activities to Steve, who at least hadn't tried to be nice about it.The Electronic Mind Reader|John Blaine
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.