moderation

Concise Oxford English Dictionary © 2008 Oxford University Press:
moderation/mɒdəˈreɪʃn/

▶noun

• 1 the avoidance of excess or extremes, especially in one's behaviour or political opinions.

• 2 the action or process of moderating.

• 3 (Moderations) the first public examination in some faculties for the BA degree at Oxford University.

– phrases
in moderation within reasonable limits.