I have nothing but respect and admiration for PG, but I don't think he gets to unilaterally decide the meaning of words.
Wikipedia says a startup is "a partnership or temporary organization designed to search for a repeatable and scalable business model"[1]. The relevant Wiktionary entry defines it as a "new organization or business venture"[2], fairly similar to the OED's "newly established business" definition[3].
As a counterpoint, the Wikipedia definition of startup was coined by Steve Blank sometime in the past ~5 years, so it's not exactly ancient history.
I think if we place emphasis on the word "scalable," PG + Blank's definitions are compatible. Both distinguish "startup" from "new company." I don't think most people would categorize building a tech company and starting a hair salon as the same activity because of the force multiplier of scale.
Wikipedia says a startup is "a partnership or temporary organization designed to search for a repeatable and scalable business model"[1]. The relevant Wiktionary entry defines it as a "new organization or business venture"[2], fairly similar to the OED's "newly established business" definition[3].
[1] https://en.wikipedia.org/wiki/Startup_company
[2] http://en.wiktionary.org/wiki/startup
[3] http://www.oxforddictionaries.com/us/definition/american_eng...