Day trading has a specific definition in this context (can't remember if it's SEC, FINRA, or some other acronym), and refers to the buying and selling of the same security with a single day. That $2.5k Fidelity account will go out of its way to tell you that you're not allowed to do that.

Yes, but you can't do that four or more times in a period of five business days if it accounts for over some percentage of your portfolio.