What do you consider sleeping through the night?

Okay so I thought sleeping through the night means they go down at bedtime and don’t cry until morning but I’m seeing some people post that their baby “sleeps through the night” and they are cosleeping and putting a boob in their mouth at the first sign of movement or “sleep through the night” minus feeds every 2-3 hours. That doesn’t not sound like sleeping through the night to me. Mostly I am jealous when someone says their baby sleeps through the night but I’m wondering if our definitions are very different. Any thoughts?

We just hit 4 month sleep regression I think and babe is waking 4-5 times a night again. Usually able to get a couple 3-4 hour stretches but that’s about it. And after 4am sleep is junk. Please tell me it ends.