Thread: Postulates vs Definitions

In geometry what is the difference between a definition and a postulate?

Originally Posted by IDontunderstand

In geometry what is the difference between a definition and a postulate?

This is I will admit is a very confusing topic.
How technical do you want the answer to be?
I prefer to use the word axiom in place of postulate.

Here is a naïve answer.
Definitions are the ‘building blocks’ of axiomatic systems.

Axioms are the rules by which the definitions are used.