Main entry: scatty, absent, absentminded, abstracted
Definition: lost in thought; showing preoccupation
Usage: an absent stare; an absentminded professor; the scatty glancing quality of a hyperactive but unfocused intelligence
Main entry: scatterbrained, scatty, rattlebrained, rattlepated
Definition: lacking sense or discretion
Usage: his rattlebrained crackpot ideas; how rattlepated I am! I've forgotten what I came for- Glenway Westcott