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
ÅGot	-	Norwegian
Ghyslain	-	French (Rare)
Mattithiah	-	Biblical
Lemoine	le-MOIN	English (Rare)
Jurica	-	Croatian, Slovene
Thyrza	-	Dutch