The quality of being forgetful or having one's mind engaged elsewhere.

विस्मृति या ध्यान न होना

English Usage: His absentmindedness often caused him to forget where he left his keys.

Hindi Usage: उसकी विस्मृति के कारण अक्सर उसे याद नहीं रहता कि उसने अपनी चाबियाँ कहाँ रखी।