Adaptation is the act or process of adapting; the state of being adapted.
Adaptation is the act of purposefully adapting two surfaces to provide intimate contact.
Adaptation is the progressive adjustive changes in sensitivity that regularly accompany continuous sensory stimulation or lack of stimulation.
Adaptation in dentistry,
(a) the degree of fit between a prosthesis and supporting structures.
(b) the degree of proximity of a restorative material to a tooth preparation.
(c) the adjustment of orthodontic bands to teeth.