The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of various slender, long-tailed Asian monkeys of the genus Presbytis and related genera that eat leaves, fruits, and seeds and have a chin tuft and bushy eyebrows.
n. Any of the Old World monkeys of the subfamily Colobinae, in the genera Simias, Trachypithecus (lutungs), Presbytis, (surilis), and Semnopithecus, (gray langurs).
The Century Dictionary and Cyclopedia
n. A native name for several large Indian monkeys of the genus Presbytis, or Semnopithecus, the two best known being the hanuman or entellus, P. entellus, the sacred monkey of India, and the black Nilgiri langur, P. johnii.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. slender long-tailed monkey of Asia
Word Usage
"In an effort to keep monkeys out of the New Delhi subways, authorities have called in one of the few animals known to scare the creatures — a fierce-looking primate called the langur, the Hindustan Times newspaper reported Wednesday."