The lexical aspect (aktionsart) of verbs or predicates that change over time and have no natural end point.
Something done as an action or a movement.
Something done for pleasure or entertainment, especially one involving movement or an excursion.
The state or quality of being active; activeness.
The number of radioactive decays per unit time. Unit for it: becquerel or curie
The propery of substances to react with other substances
The light reflected from the Moon.
To engage in an activity other than what one is known for.
To work on the side (at a secondary job), often in the evening or during the night.
To perform a secondary function substantially different from its supposed primary function, as in protein moonlighting.