definers
Definer is a noun that denotes one who defines something or establishes the meaning, scope, or criteria of a term, concept, or object. In general usage it refers to a person or mechanism that provides definitions, classifications, or standards in a given context. The term is common in scholarly writing, dictionaries, and specifications where precision about meaning is important.
In computing, definer has a specific technical sense within relational databases such as MySQL and MariaDB.