What is the meaning of Inflation?

An act, instance of, or state of expansion or increase in size, especially by injection of a gas or liquid.

An increase in the quantity of money, leading to a devaluation of existing money, adjusted for by way of higher nominal values.

Undue expansion or increase, as of academic grades.

An extremely rapid expansion of the universe, theorized to have occurred very shortly after the Big Bang.

↑ Burgess & Quevedo, "The Great Cosmic Roller-Coaster Ride", Scientific American, November 2007, p. 57.

inflation

inflation

swelling

inflation

inflation (of academic grades)

Source: wiktionary.org