dossier
Concise Oxford English Dictionary © 2008 Oxford University Press:
dossier /ˈdɒsɪə, -ɪeɪ, -jeɪ/
▶noun a collection of documents about a person or subject.
– origin C19: from Fr., denoting a bundle of papers with a label on the back, from dos ‘back’, based on L. dorsum.
'dossier' also found in these Oxford entries:

