the act of assuring; a positive declaration that something is the case
a pledge or guarantee
the quality or state of being sure or certain; freedom from doubt
confidence of mind or manner; excessive self-confidence
Thou hast a most agreeable assurance, girl — John Gay
chiefly Brit insurance in which it is certain that the insurer will have to pay out money at some time, esp life insurance
something that inspires or tends to inspire confidence