Definition:Definition

Definition
A definition lays down the meaning of a concept.

It is a statement which tells the reader what something is.

It can be understood as an equation in (usually) natural language.

Some authors distinguish between particular types of definition, particularly of symbols:

Comment
When a definiens contains "if", the intent is generally "iff".

Also see

 * Definiendum
 * Definiens
 * Undefined Term
 * Circular definition

You can't get much more circular than defining the definition of definition.