certainty -
n. (pl. -ies)
1 a an undoubted fact. b a certain prospect (his return is a
certainty).
2 (often foll. by of, or that + clause) an absolute conviction (has a
certainty of his own worth).
3 (
often foll. by to + infin.) a thing or person that may
be relied on (a
certainty to win the Derby).
for a certainty beyond the possibility of doubt. [ME f. AF certaint
