Relational nouns, or relator nouns, are a word class in many languages. They are characterized as functioning syntactically as nouns although they convey the meaning for which other languages use adpositions (prepositions and postpositions). In Mesoamerican languages, the use of relational nouns constitutes an areal feature of the Mesoamerican linguistic area, including the Mayan languages, Mixe–Zoquean languages, and Oto-Manguean languages.
Relational nouns are also widespread in Southeast Asia (e.g. Vietnamese, Thai), East Asia (e.g. Mandarin Chinese, Japanese, Lhasa Tibetan), Central Asia (e.g. the Turkic languages), Armenian, the Munda languages of South Asia (e.g. Sora), and in the Micronesian languages.