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
Nikomachos	-	Ancient Greek
Kirsti	KEER-stee	Finnish
Yazmin	YAZ-min	English (Modern)
Kylie	KIE-lee	English
Frederica	[.fredə'ri:kə]
Hadewych	HAH-də-veekh, HAH-də-weekh	Dutch