what is determiner in English Grammar?

Determiners are words which come at the beginning of the noun phrase. They tell us whether the noun phrase is specific or general. Determiners are either specific or general

Specific determiners:

The specific determiners are:

• the definite article: the
• possessives: my, your, his, her, its; our, their, whose
• demonstratives: this, that, these, those
• interrogatives: which

General determiners:

The general determiners are:

• a; an; any; another; other; what