/ sɪntʃ; NAmE / noun , verb
■ noun [ sing. ] ( informal )
1.
something that is very easy
SYN doddle :
The first question is a cinch.
2.
( especially NAmE ) a thing that is certain to happen; a person who is certain to do sth :
He's a cinch to win the race.
■ verb [ vn ]
1.
( especially NAmE ) to fasten sth tightly around your waist; to be fastened around sb's waist
2.
( NAmE ) to fasten a girth around a horse
3.
( NAmE , informal ) to make sth certain
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WORD ORIGIN
mid 19th cent. (in sense 2 of the verb): from Spanish cincha girth.