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

• surrounding
• surroundings
• sursum corda
• surtax
• surtitle
• surtout
• surveil
• ibidem
• ibis
• Ibis ibis
• Ibizan hound
• Ibizan Podenco
• Ibn al-Haytham
• ibn Talal Hussein
• ibn-Roshd
• ibn-Sina
• ibolium privet
• ibota privet
• Ibrahim
• IBRD
• Ibsen
• Ibsenian
• ibuprofen
• ic
• icaco