If other people can't edit, is a "personal wiki" a wiki?

By definition, "a wiki is a form of hypertext publication on the internet which is collaboratively edited and managed by its audience directly through a web browser."

(https://en.wikipedia.org/wiki/Wiki)

Emphasis on "collaboratively edited" -- If only one person can edit the content, it by definition isn't a wiki, is it?

There are many "personal wikis" on the internet, each of which only editable to its owner only. I feel that it is an abuse of the term. If you agree with me, what do you think would be a better name for those kind of systems?

I myself is leaning towards "digital garden", but I would like to hear about your ideas.