Identifier: meaning, definitions and examples

Used when referring to a unique label or name that distinguishes one item from another, often in databases, programming, or systems.

• The customer ID serves as a unique identifier for each client in the database.
• In programming, variables need to have unique identifiers to avoid conflicts.

Applied in contexts related to programming or systems where it denotes written instructions for a computer or a way to convey information (like a language or set of rules).

• The developers are working on the code for the new application.
• He could read the secret code hidden in the message.

Typically denotes a numerical value used for counting, calculations, or labeling sequentially arranged items.

• Please write down your phone number.
• The booking reference number is 123456.

Used in general contexts to refer to a word or set of words by which a person, animal, place, or thing is known, addressed, or referred to.

• Her name is Emily.
• What's the name of this city?

Duplicate entry, same as above.

Specifically refers to the name or handle chosen by a user when creating an account on a website or service.

• Your username for our service should be between 5-15 characters
• I changed my username because it was too difficult to remember

Refers to the credentials and process used to access a system or account; often used in the context of authentication on websites or computer systems.

• Please enter your login details to access the website
• I forgot my login password and need to reset it

Commonly used in both casual and formal contexts, mostly in IT and administrative processes. Refers to a unique number or code assigned to a person or object.

• Could you please provide your user ID? I need to find my student ID for the exam registration

Used in contexts like programming, databases or systems where a unique marker is needed to distinguish an item or element.

• Each student in the database has a unique identifier.
• In Python, variable names are identifiers.

Often used in professional or formal settings to refer to a title, role, or label assigned to someone or something.

• Her official designation is Chief Financial Officer.
• His designation as team leader was well-received.

Used when referring to a mark, sign, or object that represents an idea, process, or entity, often in contexts like mathematics, literature, or visual arts.

• The heart is a universal symbol of love.
• In algebra, x is commonly used as a symbol for an unknown value.

Appropriate when referring to a word or expression used in a particular context, subject, or field of study.

• In medical terms, her condition is referred to as hypertension.
• The term 'ecosystem' is widely used in environmental science.