A determiner is a word that functions to pre-modify and specify a particular noun. Along with cardinals and ordinals, they make up the set of specifiers, which assist in reference - that is, determining exactly which of several possible alternative objects in the world is referred to by a noun phrase. A determiner is a pre-modifier for a noun phrase e.g. this (demonstrative adjective), some (quantifier), my (possessive adjective), a/the (article). A determiner is used to make clear which noun is referred to, or to give information about quantity, and includes words such as the, a, this, that, my, some, e.g. That car is mine.
The following table shows a list of determiners.