n. & v.
--n.
1. colloq. a a sure thing; a certainty. b an easy task.
2 a firm hold.
3 esp. US a girth for a saddle or pack.
--v.tr.
1. a tighten as with a cinch (cinched at the waist with a belt). b secure a grip on.
2 sl. make certain of.
3 esp. US put a cinch (sense 3) on.
Etymology: Sp. cincha