lost in thought

not aware of what is happening around you because you are thinking about something else I didn't answer right away because I was lost in thought.

Concentrating on or pondering over something. For example, Gwen didn't hear a word you said; she was lost in thought.

Name	Pronounced	Usage
MÁEdÓC	-	Ancient Irish
Harshada	-	Indian, Hindi, Marathi
Adi (2)	-	Indonesian
Indiana	in-dee-AN-ə	English
İKbal	-	Turkish
HermÍNia	-	Portuguese