Adjective: absentminded ,ab-sunt'mIn-did
- Lost in thought; showing preoccupation
"an absentminded professor";
- absent, abstracted, scatty [Brit, informal]
- Tending to forget or fail to notice things due to preoccupation with one's thoughts
"He was so absentminded he put his keys in the refrigerator"
See also: inattentive, unattentive [rare]
Encyclopedia: Absentminded