Nancy Wagaman Interpretation: Something that represents something else valuable, or that stands in for something valuable (as a check stands in for cash).
A promise or an “IOU” (such as for a favor, support, etc.).
Cashing a check can represent collecting on a promise or debt; something given in return for something received (both could be tangible or intangible in real life).
See also: Money; Finances; Giving; Paying