Is sense an abstract noun

The noun 'senses' (the plural form of 'sense') is an abstract noun as a Word for abilities or perceptions.

The physical senses, to see, to hear, to smell, to taste, to touch, are verbs. The noun forms (gerunds) seeing, hearing, smelling, tasting, touching are abstract nouns, abilities perceived by the brain; without intrepretation by the brain, they do not exist. A thing that is seen, heard, smelled, tasted, or touched is a physical thing and the Word for that thing is a concrete noun.