Unidirectional is a term that is often used to describe a one-way flow of information or energy. However, there are many synonyms for the word that can be used to convey the same meaning in different contexts. Some of these synonyms include one-way, single-channel, linear, directed, and forward-facing. Other related terms that can be used in place of unidirectional include unipolar, unilateral, and one-sided. Whether you are speaking about the flow of electricity through a circuit or the transmission of data through a network, there are many ways to express the concept of something that moves in a single, defined direction.