Definitions

1. noun

A person who is a friend of the court in a lawsuit, often hired by one of the parties to provide an objective opinion or to act as a liaison.

“The judge considered the testimony of the expert witness, who was an amicus, before making a decision in the case.”

2. adjective

Friendly or favorable.

“The amicus verdict gave the company a significant boost in public opinion.”

3. noun

A friend.

“He considered his old friend an amicus in times of need.”