1) Ceremonial knife 2) Dagger 3) Indian melee weapon 4) Sticker 
The kirpan (n; ਕਿਰਪਾਨ {IAST|kirpān}) is a ceremonial sword or dagger carried by baptised Sikhs. It is a religious commandment given by Guru Gobind Singh in 1699 in which all baptised Sikhs must wear five articles of faith at all times, the kirpan being one of five articles. The word kirpan has two roots - the first root is `kirpa`, .....
small sword or dagger worn by Sikhs
(from the article `Sikhism`) ...kesh (uncut hair), kangha (comb), kacch (short trousers), kara (steel bracelet), and kirpan (double-edged dagger)—did not become an obligation of ...
noun a ceremonial four-inch curved dagger that Sikh men are obliged to wear at all times
a small dagger worn by orthodox Sikhs.