A relational noun is grammatically speaking a simple noun, but because its meaning describes a spatial or temporal relation, rather than a "thing", it describes location, movement, and other relations, just like prepositions in the languages that have them. When used, the noun is "owned" by another noun and describes a relation between its "owner" and a third noun. For example, one could say "the cup is the table its-surface", where "its surface" is a relational noun denoting the position of something standing on a flat surface. Here are examples:
Often, relational nouns are derived from or related in meaning to words for bodyparts and so, for example, to say "inside", one says "its stomach", and to say "on top of", one says "its back".[citation needed]
Starosta, Stanley (1985). "Relator nouns as a source of case inflection". In Venetta Z. Acson and Richard L. Leed (ed.). For Gordon H. Fairbanks. Honolulu: University of Hawaii Press. pp.111–133. ISBN0-8248-0992-0.