1. Out of bed
   "are they astir yet?"
   - up 
2. On the move
   "the whole town was astir over the incident"
   - about

See also: active, awake

• foetoprotein
• foetor
• foetoscope
• foetoscopy
• foetus
• fog
• fog up
• fogbank
• fogbound
• fogey
• fogged
• foggily
• fogginess
• foggy
• Foggy Bottom
• foghorn
• foglamp
• fogsignal
• fogy
• fogyish
• foible
• foie gras
• foil
• foiled
• foiling