1 the process or an instance of moderating.
2 the quality of being moderate.
3 Physics the retardation of neutrons by a moderator (see MODERATOR 5).
4 (in pl.) (Moderations) the first public examination in some faculties for the Oxford BA degree.
Phrases and idioms:
in moderation in a moderate manner or degree.
Etymology: ME f. OF f. L moderatio -onis (as MODERATE)
Useful english dictionary. 2012.