1) Genus varanus 2) Reptile genus 
• (n.) A genus of very large lizards native of Asia and Africa. It includes the monitors. See Monitor, 3.
sole genus of the lizard family Varanidae, and composed of the monitor lizards (see monitor lizard); one of the Varanidae is Varanus komodoensis, ...
Va·ra'nus noun [ New Latin , from Arabic waran , waral ; confer French varan , from the Arabic.] (Zoology) A genus of very large lizards native of Asia and Africa. It includes the monitors. See Monitor , 3. 
[n] - type and sole extant genus of the Varanidae
genus Varanus noun type and sole extant genus of the Varanidae