The Collaborative International Dictionary of English v.0.48:
Astir \A*stir"\, adv. & a. [Pref. a- + stir.] Stirring; in a state of activity or motion; out of bed. [1913 Webster] AstomatousWordNet (r) 3.0 (2006):
astir adj 1: out of bed; "are they astir yet?"; "up by seven each morning" [syn: astir(p), up(p)] 2: on the move; "up and about"; "the whole town was astir over the incident" [syn: about(p), astir(p)]