Nicki Minaj & Meek Mill Done Fighting ... In It For The Long Haul

Nicki Minaj and Meek Mill are back together and plan to keep it that way during his house arrest sentence and beyond.

Sources close to Nicki and Meek confirm they took about a 3 week hiatus ... which ended when Nicki popped up again on Meek's Snapchat earlier this week. We're told they both realized their communication skills suck and that's caused a lot of unnecessary fighting.

Meek's legal issues put a huge strain on the relationship -- especially because Meek wanted Nicki to stay with him during his sentence -- but we're told she's softened her opposition.

According to our sources, Nicki will be in Philly whenever possible. She has upcoming tour dates in South Africa, but that aside ... she's ride or die.

She posted a selfie from Meek's crib on Friday ... showing off the ring he gave her and the cleavage she's giving him, we suspect.

Meek wins.