Definition of "iguana"

iguana

/ɪ.ɡjuˈɑːnə/

noun
plural iguanas
1. A green iguana (Iguana iguana), a large tropical American lizard often kept as a pet.
2. (zoology) Any member of the genus Iguana.
3. Colloquially, in America and the Pacific, any of several members of the lizard family Iguanidae.
4. Colloquially, in Africa, any large member of the genus Varanus, especially the aquatic Nile monitor (see leguan).
5. (Australia, formerly) Any member of the genus Varanus (see goanna).
  Quotations
  The last they had had, was an iguana one of the blacks had brought in; and though he felt disgusted at the idea of eating it, he made up into a kind of stew, and they both enjoyed it immensely.
  1887, Harriet W. Daly, Digging, Squatting, and Pioneering Life in the Northern Territory of South Australia, page 161