Definition of Activity

Noun: activity ak'ti-vu-tee

Any specific behaviour
"they avoided all recreational activity"
The state of being active
"his sphere of activity";
- action, activeness
An organic process that takes place in the body
"respiratory activity";
- bodily process, body process, bodily function
(chemistry) the capacity of a substance to take part in a chemical reaction
"catalytic activity"
A process existing in or produced by nature (rather than by the intent of human beings)
"volcanic activity";
- natural process, natural action, action
The trait of being active; moving or acting rapidly and energetically
"the level of activity declines with age";
- activeness