1. under that; beneath that
Usage: formal; legal
2. according to the terms or provisions of that document or law
Usage: legal; formal

Examples

• The contract specifies the terms, and all parties must comply thereunder.
• The statute establishes penalties, and violations thereunder are prosecuted.
• The bridge spans the river, with boats passing thereunder.
• The agreement creates obligations thereunder for both companies.
• The law provides protections, and citizens may seek remedies thereunder.
• The table had documents stored thereunder.
• The regulations specify procedures, and applications filed thereunder must follow them.