In contract law, the clarity and precision of language are paramount. One of the most important tools for achieving this clarity is the use of definitions and interpretation clauses. These sections provide consistency, avoid ambiguity, and ensure that the contract reflects the true intentions of the parties. The interpretation of contractual language by courts also relies heavily on the definitions agreed upon by the parties. This article examines the legal significance, drafting considerations, practical usage, and potential pitfalls of definitions and interpretation provisions in commercial contracts.