Definition - What does Infra mean?
Infra is a Latin term that means "below."
In the context of the law, infra is used in citations for legal briefs or other documents to indicate that more information about a topic will be mentioned "below."
Infra is the opposite of supra, which means "above," and indicates that more information about a topic is given above.
Justipedia explains Infra
The word "infra" is commonly used when a case is being mentioned in a legal brief. For example, a legal brief may mention a case such as "Wilson vs. Jones, infra." Such a reference would indicate that more information would be provided about the case "Wilson vs Jones" below. If the legal brief instead made a reference to "Wilson vs Jones, supra," this would indicate that more information about the case was provided above.