* Formal: "The communication between the server and the client is unidirectional, with data flowing only from the server to the client."
* Technical: "The new traffic system employs a unidirectional flow of traffic, preventing head-on collisions."
* Descriptive: "The ancient aqueduct was designed with a unidirectional flow, ensuring water always moved downhill to the city."
* Figurative: "His thoughts were unidirectional, always focused on achieving his goals, regardless of the cost."
Key takeaway: "Unidirectional" means moving in one direction only.