What does it mean when Jacob imprinted on Renesmee?

In Jacob’s case, he imprinted on Renesmee — who he affectionately dubbed Nessie — when she was a baby, so no, it doesn’t mean he’s in love with her. Jacob just has a strong bond to Renesmee and is more of a protector and as she gets older, will be a best friend, someone who’s there for her when she needs it.

What does it mean when Edward Said Jacob imprinted?

As it’s explained in the novels and in the movies, imprinting is something the Quileute shape-shifters aka werewolves do that basically finds their soulmates. They can’t control when it happens or to who, and it can happen at any age. “Imprinting on someone is like when you see her, everything changes.