lacking sense or discretion; his rattlebrained crackpot ideas; how rattlepated I am! Ive forgotten what I came for- Glenway Westcott

[ Syn: rattlebrained , rattlepated , scatterbrained ]

lost in thought; showing preoccupation; an absent stare; an absentminded professor; the scatty glancing quality of a hyperactive but unfocused intelligence

[ Syn: absent , absentminded , abstracted ]