Multimodal interaction refers to the use of multiple modes of communication to facilitate human-computer interaction. This can include a combination of text, voice, gestures, and visual elements, allowing users to engage with technology in a more natural and intuitive way. For example, a user might speak a command while simultaneously using hand gestures to control a device. This approach enhances user experience by accommodating different preferences and contexts. It is commonly seen in applications like virtual assistants, such as Siri or Alexa, where users can interact through voice commands, touch screens, or even facial expressions, making technology more accessible and efficient.