forming nouns from verbs, denoting:
the action, or process, or result of doing something
flirtation
computation
the result or product of the action or process specified
alteration
plantation
the state or condition resulting from the process specified
elation
agitation
[Middle English -acioun via Old French -ation from Latin -ation-, -atio, from -atus -ate1 + -ion-, -io -ion]