Dossier is used in formal settings like legal, investigative, or academic work, not casual conversation. The lawyer prepared a dossier for the upcoming trial.
Pro Tip 2/3
Impersonal Feel
A dossier often summarizes information impersonally, without expressing opinions or feelings. The agent's dossier on the case was just facts and evidence.
Pro Tip 3/3
Thorough Investigation
A 'detailed dossier' implies thorough research and comprehensive information on the subject. Her dossier on climate change was both informative and exhaustive.