As`sue·fac'tion noun [ Latin assuefacere to accustom to; assuetus (past participle of assuescere to accustom to) + facere to make; confer Old French assuefaction .] The act of accustoming, or the state of being accustomed; habituation. [ Obsolete] « Custom and... Found on http://www.encyclo.co.uk/webster/A/134