Definitions:

1. A form of learning that involves a reduction in responsiveness to a stimulus that is neither rewarding nor harmful. NOUN
   • Habituation to loud noises can reduce the perceived intensity of subsequent exposures, making it easier to tolerate noisy environments.
2. A psychological phenomenon wherein an organism becomes accustomed to a repeated stimulus over time and subsequently exhibits a decreased response to that stimulus. NOUN
   • The loud noise of passing trains outside my window caused habituation over time, diminishing its ability to startle me.
3. Being abnormally tolerant to and dependent on something that is psychologically or physically habit forming. NOUN
   • Constant handling and petting of a pet can result in habituation to human touch, reducing stress and fear responses.

Synonyms:

• adaptation
• addiction
• adjustment
• conditioning
• familiarization
• tolerance