A particular form or kind of activity; an active process: the discharge of a function.
A form or instance of activity or operation, esp. one which occurs in nature; an action. Obsolete.
Subcategories:
— operations collectively (1)
— which do not constitute performance (1)
— natural or involuntary (1)
— artificial or voluntary (1)
— on a minute scale (1)
— series of dependent operations (4)
— with repeated use of fuel or fluid (1)
— with single use of fuel or fluid (1)