determiner meaning
ENWDeterminer
- A determiner (also called determinative) is a word, phrase or affix that occurs together with a noun or noun phrase and serves to express the reference of that noun or noun phrase in the context.
FR déterminer 
- NounPLdeterminersPREdé-SUF-er
- (grammar) A member of a class of words functioning in a noun phrase to identify or distinguish a referent without describing or modifying it.
- (grammar) A dependent function in a noun phrase marking the NP as definite or indefinite. This function is usually filled by words in the determinative class but may be filled by other elements such as a genitive pronoun.
- Something that determines, or helps someone to determine, something else.
- (grammar) A member of a class of words functioning in a noun phrase to identify or distinguish a referent without describing or modifying it.
Definition of determiner in English Dictionary
- Part-of-Speech Hierarchy
- Morphemes
- Suffixes
- Words by suffix
- Words suffixed with -er
- Words suffixed with -er
- Words by suffix
- Suffixes
- Nouns
- Countable nouns
- Agent nouns
- Countable nouns
- Morphemes
Source: Wiktionary
Grammatically, this word "determiner" is a morpheme, more specifically, a suffixe. It's also a noun, more specifically, a countable noun and an agent noun.