Yes, the term "entanglement" has been in use for a long time in the field of physics and specifically in the context of quantum mechanics. It predates the more recent popularization of the term through the Will Smith and Jada Pinkett Smith situation.
In the context of quantum mechanics, entanglement refers to a phenomenon where the quantum states of two or more particles become correlated in such a way that the state of one particle cannot be described independently of the state of the other particle(s). This concept has been studied and discussed by physicists since the early days of quantum theory.
The usage of the term "entanglement" in the Will Smith and Jada Pinkett Smith situation was metaphorical, drawing an analogy between their relationship difficulties and the complex interconnectedness observed in quantum entanglement. This metaphorical usage gained attention in popular culture but does not have any direct connection to the scientific concept of quantum entanglement.