Powerful unidirectional microphones can pick up conversations through open windows. These processes are unidirectional, that is, they do not function in reverse.
Definition of 'unidirectional' unidirectional in British English (ˌjuːnɪdɪˈrɛkʃənəl , -daɪ- ) adjective having, moving in, or operating in only one direction
Unidirectional refers to something moving or operating in one single direction, or having a single orientation. It's often used to describe signals, data transfer, processes, or relationships where transmission or action takes place from one point to another without reversal or reciprocation.
