Is inside a concrete or abstract noun?

The noun 'place' is an abstract noun as a Word for the designated role or function of something; the suitable setting or occasion for something; someone's social station, rank, or status; a job, posting, or position; a Word for a concept.

The noun 'place' is a concrete noun as a Word for a physical position or location; a Word for a physical thing.

The noun form of the verb to place is placement; an abstract or concrete noun depending on context, as above.