Modern money creates, transforms, transports, and possesses meaning by virtue of how it is used. This article devises a framework for the systematic study of monetary meaning. In particular, monetary meanings depend on the flow of money (both its proximate source and future direction) and on who promulgates or issues it. Meanings also derive from how money's use and flow are restricted and on monetary media. Monetarization quantifies social activities and introduces new equivalences and comparisons. The factors shaping meaning also underpin important types of monetary variation (homogeneous vs. differentiated money; anonymous vs. personal; material vs. immaterial).