When you take funding, you may (or may not) give away part of your ownership stake (aka equity). As long as you maintain more than 50% ownership, you're still the owner... because you have the ability to make a "majority" decision by yourself. So, I'm still the owner, but that may not always be the case (eg. if we take more funding).
> * As long as you maintain more than 50% ownership, you're still the owner*
Maybe pedantic, but here goes: If you have given away so much as a single share, the usual phraseology is that you are "part-owner", because you own only a part. Saying "The owner" implies there is only one, which is false.
If you declare to the other shareholder that you are the owner, you might find an interesting reaction.
That's a good point, I suppose. Though, a convertible note structure prevents any dilution at all until subsequent funding happens... but that's getting even more pedantic of me ;)