SimWord of the Day: Habituation

ha·bit·u·a·tion
n.

1. The process of habituating or the state of being habituated.
2. 1. Physiological tolerance to a drug resulting from repeated use.
   2. Psychological dependence on a drug.
3. Psychology. The decline of a conditioned response following repeated exposure to the conditioned stimulus.

or

ha·bit·u·ate

1. transitive verb

make somebody used to something: to accustom a person or animal to something through prolonged and regular exposure ( formal )
People living in cities become habituated to crowds.

2. transitive and intransitive verb

psychology learn to ignore stimulus: to learn not to respond to a stimulus that is frequently repeated, or teach a person or animal to do this

[16th century. <> habituat-, past participle of habituare "bring into a state" <> habitus (see habit)]