Main Entry:

ha·bit·u·a·tion

Pronunciation:

\-ˌbi-chə-ˈwā-shən, -chü-ˈā-\

Function:

noun

Date:

15th century

1: the process of habituating : the state of being habituated2 a: tolerance to the effects of a drug acquired through continued use b: psychological dependence on a drug after a period of use — compare addiction3: decrease in responsiveness upon repeated exposure to a stimulus