1. Being up to particular standard or level especially in being up to date in knowledge
   "always au fait on the latest events"
   - abreast, au courant, up on, apace [N. Amer]

See also: informed

Encyclopedia: Au fait

• infectious
• infectious agent
• infectious disease
• infectious hepatitis
• infectious mononucleosis
• infectious polyneuritis
• infectiously
• infectiousness
• infective
• infective agent
• infecund
• infelicitous
• infelicitously
• infelicity
• infer
• inferable
• inference
• inferential
• inferior
• inferior alveolar artery
• inferior cerebellar artery
• inferior cerebral vein
• inferior colliculus
• inferior conjunction
• inferior court