My Definition of Enterprise Architecture

Someone recently asked me to define what an Enterprise Architect is.  I'm usually pretty good with definitions, but this time I was stuck.  I went to Google and found out I wasn't the only one.

After some thought, here is my attempt at a definition:

Enterprise architecture is a practise concerned with:

1. Business - technology alignment
2. Disciplined Innovation (innovation where it is needed)
3. Disciplined delivery (not re-inventing the wheel; consistency with past efforts; repeatability)
4. Proactive solutions (proposing solutions when systems no longer support needed business capabilities)

I hope to have time to elaborate more on this a bit later.