Determiner

part of speech reflecting the reference of a noun
Examples
  • The girl is a student.
  • I've lost my keys.
  • Some folks get all the luck.
  • Which book is that?
  • I'll take this one.
  • Both windows were open.

In linguistics, a determiner (abbreviated DET) is a word which adds information to a noun. It gives information about the context of the noun. A determiner may show whether the thing described is definite or indefinite, closer or more distant, singular or plural, etc.

Common kinds of determiners include definite and indefinite articles (like the English the and a or an), demonstratives (this and that), possessives (my and their), quantifiers (many, few and several), numerals (three, twenty), this may mean it tells you how many of something there is.