A noisy or unrestrained carousal or frolic; a spree. (Slang) "A Calcutta-made pony cart had been standing in front of the manager's bungalow when Raja Singh started on his jamboree."
2.
A large festive gathering.
3.
An assembly of boy scouts, usually at the national or international level, including camping among the activities; a term adopted by the Boy Scouts organization.