biological process, organic process - a process occurring in living organisms

grammatical construction, construction, expression - a group of words that form a constituent of a sentence and are considered as a single unit; "I concluded from his awkward constructions that he was a foreigner"

complexity, complexness - the quality of being intricate and compounded; "he enjoyed the complexity of modern computers"

group action - action taken by a group of people

commitment - an engagement by contract involving financial obligation; "his business commitments took him to London"

intervention, intercession - the act of intervening (as to mediate a dispute)

group participation - participation by all members of a group

mathematical operation, mathematical process, operation - (mathematics) calculation by mathematical methods; "the problems at the end of the chapter demonstrated the mathematical processes involved in the derivation"; "they were learning the basic operations of arithmetic"

change of shape - an action that changes the shape of something