Geist ( ) is a German word. Depending on context it can be translated as the English words mind, spirit, or ghost, covering the semantic field of these three English nouns. Some English translators resort to using "spirit/mind" or "spirit (mind)" to help convey the meaning of the term.
Geist is a central concept in Hegel's The Phenomenology of Spirit (Phänomenologie des Geistes).
Read more about Geist: Etymology and Translation, Hegel, Others