devaluation-n; 2 Senses

Sense Number 1: an official reduction in the value of a currency

Commentary: DEVALUATION[+event][+official][+reduction][+value][+currency]

The devaluation of the peso meant economic woes for Mexico.
The banks would like to avoid further devaluation of the dollar against the euro.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: process of decline of something's importance

Commentary: DEVALUATION[+process][+decline][+importance]

Recent decades have seen the devaluation of Marxist theory.
It's an article about the devaluation of dress codes in public life.
There has been some devaluation of commercial real estate in the northeast over the past six months. (loss of monetary worth, but not currency itself - Sense 1)

WordNet 3.0 Sense Numbers: 2