omnidirectionalPronunciation: /ˌɒmnɪdɪˈrɛkʃ(ə)n(ə)l, -dʌɪ-/Definition of omnidirectional adjective Telecommunications receiving signals from or transmitting in all directions: an omnidirectional microphoneomnidirectional in other Oxford dictionaries Definition of omnidirectional in the US English dictionary