definition of multisensory environments: Also known as snoezelen. These are special rooms that bring together equipment in one place in order to stimulate the senses in a controlled setting. Planned stimulation of the senses may be helpful for sensory integration issues and for people with autism. The multisensory environment may be a dedicated room where equipment and other items are designed to stimulate the senses (sight, sound, touch, smell, and taste). Sensory rooms may be used in sensory integration therapy.