Definition of "identifier" in English

noun

1. Someone who identifies; a person who establishes the identity of someone or something.

2. Something that identifies or uniquely points to something or someone else.

3. One who identifies as a particular type or role; one who says and believes that they are a certain thing.

4. A guidebook that helps determine the specific class of an object (such as a mushroom, herb, fish, bird, drug, or mineral), or its individual identity (such as that of a star).

5. (programming, operating systems) A formal name used in source code to refer to a variable, function, procedure, package, etc. or in an operating system to refer to a process, user, group, etc.

6. (HTML) A code that distinguishes a particular element from all other elements in a document.

7. (databases) A primary key.