Meaning of the word doppelganger in English

What does doppelganger mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

doppelganger

US /ˈdɑː.pəlˌɡæŋ.ɚ/
UK /ˈdɒp.əlˌɡæŋ.ər/

Noun