habituation

ha·bit·u·a·tion

noun \-ˌbich-ə-ˈwā-shən\

Definition of HABITUATION

1

: the act or process of making habitual or accustomed

2

a : tolerance to the effects of a drug acquired through continued use b : psychological dependence on a drug after a period of use—compare addiction

3

: a form of nonassociative learning characterized by a decrease in responsiveness upon repeated exposure to a stimulus—compare sensitization 3