👉 An interloper is an individual who enters into or interferes with a situation, especially by taking advantage of someone else's opportunities for influence. In legal terms, it refers to individuals who have been granted permission to enter into a particular relationship or area without proper authorization. In the context of law and society, an interloper can be defined as an individual who has entered into a contractual relationship with another party, but because they are not authorized by that party to do so, they may take