A more thorough explanation:

ground, n. - The reason or point that something relies on for validity, such as a legal claim or argument. For example, a person may have grounds for divorce if their spouse has committed adultery or has been abusive. Another example is when a defendant may have grounds for appeal if they believe their trial was unfair or their rights were violated.

ground, vb. - To provide a basis for something, such as a legal claim or argument. For instance, a court decision may be grounded on public policy, meaning that the ruling was based on what is best for the public as a whole. Another example is when a legal principle or judicial decision is grounded on common law, meaning that it is based on previous court decisions and legal traditions.

Overall, the term "ground" refers to the foundation or basis for something, particularly in a legal context. It is the reason or justification for a claim or decision, and it is what gives it validity and support.