a small microprocessor-controlled robot vehicle that is able to navigate its way through an unknown maze

a small robot which is normally built for competitions in maze solving, duel, etc

a small, self-contained robot that can negotiate and learn a maze

Micromouse is an event where small robot mice solve a 16x16 maze. It began in late 1970s, although there is some indication of events in 1950. Events are held worldwide, and are most popular in the UK, U.S., Japan, Singapore and South Korea.