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
Carroll	['kærəl]
Janie	JAY-nee	English
Ainslie	['einzli]
Klaas	KLAH:S	Dutch, Low German
Porphyrios	-	Ancient Greek
Ramirus	-	Ancient Germanic (Latinized)