Legal Definition
The assignor is the party who transfers rights, interests, or obligations to another party, typically in a legal context such as a contract or legal claim. In essence, it is the original party that delegates their rights or obligations to a new party.
Plain-English Translation
Imagine you have a right to something (like a right to collect money from someone), and you decide to hand that right over to another person. The assignor is the person who starts the process of giving that right away.