Entry 1 sense Webster, 1913 Dossier /(dō̇s`syā̇"; E. dŏs"sĭ*ẽr)/ · Dos·sier · IPA /ˈdɔs.jeɪ/ 01 n. A bundle containing the papers in reference to some matter. 1. A bundle containing the papers in reference to some matter.