Multimodal integration, also known as multisensory integration, is the integration in the brain of inputs from the various senses, to form multimodal representations or percepts.
To take an example, a single event such as an object falling on one's foot is likely to generate input for vision, audition, tactition (the perception of pressure), and nociception (the perception of pain). The fact that we are able in some way to connect all of those, and to attribute the different percepts to a single cause, exemplifies multimodal integration.