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

• atomic clock
• atomic cocktail
• atomic energy
• Atomic Energy Commission
• atomic explosion
• atomic mass
• atomic mass unit
• atomic number
• atomic number 1
• atomic number 10
• atomic number 100
• atomic number 101
• atomic number 102
• atomic number 103
• atomic number 104
• atomic number 105
• atomic number 106
• atomic number 107
• atomic number 108
• atomic number 109
• atomic number 11
• atomic number 110
• atomic number 111
• atomic number 112
• atomic number 113