n 1  :  the act or process of adjusting: as  a  :  the process of modifying one's behavior in changed circumstances or an altered environment in order to fulfill psychological, physiological, and social needs <sexual to marriage>   b  :  a functional and often transitory alteration by which an organism adapts to its immediate environment - compare ADAPTATION2b    2  :  a means (as a mechanism) by which things are adjusted one to another <an for focusing a microscope>  ad*just*men*tal adj 
 
 
 
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