figment of (one's)/the imagination

An experience that initially is thought to be real but is actually imagined. I thought I heard the sound of my front door opening last night but it turned out to be a figment of my imagination.

Common Names:

Name	Pronounced	Usage
Enkhtuya	-	Mongolian
Guillaume	gee-OM	French
Todor	-	Bulgarian, Serbian, Macedonian
Jordan	['dʒɔ:dn]
Vlad	VLAHT (Russian)	Russian, Romanian, Medieval Slavic
Vadimir	-	Russian (Rare)