The definition of "islam" is pretty straighforward, and contained in the Shahada. I have not been saying anything special or unusual, which you would know if you actually read up on islamic doctrine.
To give you a head-start, here is a quote that addresses your naive ignorance about the concept of "peace" directly:
"Both sides should acknowledge candidly that although they might use identical terms, these mean different things to each of them. The word peace, for example, implies to a Muslim the extension of the Dar al-Islam -- or House of Islam -- to the entire world. This is completely different from the Enlightenment concept of eternal peace that dominates Western thought. Only when the entire world is a Dar al-Islam will it be a Dar a-Salam, or House of Peace." (Bassam Tibi)