a. A girth for a pack or saddle.
b. An encircling cord, band, or belt.
a. Something easy to accomplish. See Synonyms at breeze1.
b. A sure thing; a certainty: Their team is a cinch to win the tournament.
v. cinched, cinch·ing, cinch·es
a. To put a saddle girth on (a horse).
b. To secure (a saddle) by means of a cinch.
c. To encircle or wrap tightly: "her hair orderly, her nightgown cinched around her neck" (E. Annie Proulx).
d. To tighten (an encircling cord or belt, for example).
2. Informal To make certain; secure or guarantee: cinch a victory.
To tighten an encircling band or saddle girth. Often used with up.
[Spanish cincha, feminine of cincho, belt, from Latin cīnctus, from past participle of cingere, to gird; see kenk- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.