1. Formal Definitions:
* Also known as lexical definitions.
* Provide the essential meaning of a term. They focus on the dictionary definition and are often used in academic or formal settings.
* Follow a specific structure: Term + Class + Differentia.
* Term: The word or phrase being defined.
* Class: The general category the term belongs to.
* Differentia: The characteristics that differentiate the term from other members of the class.
* Example: "A bicycle is a wheeled vehicle propelled by human power using pedals."
* Term: Bicycle
* Class: Wheeled vehicle
* Differentia: Propelled by human power using pedals
2. Informal Definitions:
* Used in everyday language.
* Less formal and more descriptive. They aim to convey a general understanding of a term, often using examples or analogies.
* Don't follow a rigid structure.
* Example: "A bicycle is a great way to get around town and get some exercise." This definition provides an understanding of how bicycles are used, but doesn't focus on the technical aspects.
There are other types of definitions, such as:
* Operational Definitions: Describe how a term is measured or observed.
* Stipulative Definitions: Assign a specific meaning to a term for a particular purpose.
* Persuasive Definitions: Attempt to influence the reader's opinion of the term.
The type of definition you use will depend on the context and your purpose.