in one's own world

Also, in one's own little world; in a world of one's own. In deep thought or concentration. For example, Luanne was really in her own world at the meeting this morning, or Like many mathematicians, Bill lives in his own little world, or Bob's in a world of his own when he's listening to music. [Late 1500s]

Common Names:

Name	Pronounced	Usage
Yehu'	-	Biblical Hebrew
Yuuma	yoo:-mah	Japanese
Hanna (1)	HAHN-nah (Finnish, Polish, Ukrainian), HAH-nah (German)	Swedish, Norwegian, Danish, Finnish, Polish, Ukrainian, Belarusian, German, Dutch, Icelandic, Hungar
Vicky	VIK-ee	English
Sosruko	-	Caucasian Mythology
Florian	FLO-ree-ahn (German), FLAWR-yahn (Polish)	German, Polish, French