Definition: An "old world monkey" is a type of monkey that is found in Africa, Arabia, and Asia. These monkeys are different from "new world monkeys," which are found in the Americas. Old world monkeys have certain characteristics, such as tails that are not used for grabbing things (nonprehensile tails) and nostrils that are close together.
"Old world monkey" refers to a group of monkeys found in Africa, Arabia, and Asia, characterized by their nonprehensile tails and close-set nostrils.