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

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• Charadriidae
• Charadriiformes
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• Charadrius melodus
• Charadrius morinellus
• Charadrius vociferus
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