concrete noun [Lat. concretus ‘solid, dense’]

Concretes form a class of nouns that contrasts semantically with abstract nouns; they are divided into proper names ( proper nouns. e.g. Philip, Chomsky), common (or generic) nouns (e.g. human, linguist), materials (e.g. ink, iron) and groups ( collective noun), (e.g. family, cattle).