Revert/convert
Most people tend to ask which is which, and majority are used to convert. How ever the proper term is in fact revert, addressing to the fact that a person is going back to what or who they once were. We are all born with the natural disposition of submitting or serving Allah. Somewhere along the way we just get lost and need to find our way back.
By definition conversion is a change or shift from one state or matter to another such as water to ice.
The concept in islam is based on going back to ones natural state. Before we were anything else in the world, we came out of our mothers woumbs as Muslims ( those who submit). Going back to Mother Nature, going back to Allah. Having back to your natural form of state. And may Allah guide us all to the natural state of being.
Being a revert takes place in one particular moment, where upon you are muslim for ever after embrace.