Dictionary:

langur

  (läng-gʊr')

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.

[Hindi la[ndot]gūr, perhaps from Sanskrit lā[ndot]gūlam, tail.]

Large, slim monkey without prehensile tail. Member of the genus Presbytis in the family Circopithecidae, the Old World monkeys.

The noun has one meaning:

Meaning #1: slender long-tailed monkey of Asia