Yes, there is the dictionary definition (I would say the proper one) and then there is Paul Grahams definition, which includes the fast growth part. Being on this site, the second one is often assumed to be the proper definition.
If I open a hot dog stand, I may have incorporated only a month ago, but I haven't founded a startup.
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This reminds me of one of my favorite HN posts ever. It's about dictionaries, good and bad.
No. For that, you'll have to provide a narrative of how you will revolutionize the global fast food market and secure the fate of humanity by providing billions of people real-time access to the very best of bovine and porcine by-product nutrition (optional: include heart-warming story about Denise, a mother of 7 from Decatur, IL, who was enabled to escape a hell of drug abuse and prostitution by opening a franchise, highlighting the world changing nature f your business and elegantly glossing over the fact that the franchise owner effectively earns less than a toddler searching landfills for sources of lithium).
Allowed to fester, the spin-terrorists will rape a language to its death.
Hackernews is not the world.
That must be why this is a reoccurring discussion on HN...