1. a word that comes before a noun to specify which thing is being referred to
Usage: grammar
2. a person or thing that determines or decides something

Examples

• Articles like ‘the’ and ‘a’ are common determiners in English.
• Possessive words such as ‘my’ and ‘their’ function as determiners.
• The determiner ‘this’ helps specify which book you mean.
• Demonstrative determiners include ‘that’ and ‘those’.
• Hard work was the main determiner of his success.
• Weather conditions are often the determiner of outdoor events.