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
Eugenius	-	Ancient Greek (Latinized)
Saleh	-	Arabic
Davidu	-	Old Church Slavic
Taddeo	-	Italian
Konstanze	-	German
Talisha	tə-LEESH-ə, tə-LISH-ə	African American (Rare)