Assuefaction As`sue*fac"tion, n. [L. assuefacere to accustom to; assuetus (p. p. of assuescere to accustom to) + facere to make; cf. OF. assuefaction.] The act of accustoming, or the state of being accustomed; habituation. [Obs.] Custom and studies efform the soul like wax, and by assuefaction introduce a nature. --Jer. Taylor.