Ah. I see it. I was looking under voter, and it certainly isn't there. I looked up colonist in my Webster's and that meaning doesn't appear. Never, ever heard it used that way, and I live in one of the colonies. :)
Hi jazzy
Where are you finding it? My 1972 edition has pretty much the same entry as my 1999. There is a long list of meanings of "vote", followed by just n. voter, then the compound words.