How do you prefer to define it?

Hi everyone, I've been doing some research about autism during a few weeks now and I developed a question.

I've read that in some places they define it as a "neurodevelopmental disorder" and others say, as for example this organization, it's "a lifelong developmental disability...".  How do you feel regarding the word disability? Do you prefer to call it a disorder or a disability? And why? Do you prefer another way of calling it? I would genuinely love to know. 

My hope is to gather information as realistic as it can be so I can start advocating for autism in the near future. Thanks to all of you. You're great humans!