Jamboree used in English, as a borrowed foreign word, with the ending -ree. The word Jamboree is a transitive verb with a direct action of the primary word Jambo. For example, an attendee of a Jambo is a Jamboree. The word "Jamboree" is used primarily by the Scouting program before the first Boy Scout "Jamboree" in 1920. The word has also come to mean "a lavish or boisterous celebration or party" outside of the Scouting program. Baden-Powell deliberately chose the name "Jamboree" where attendees were warmly welcomed attending this first Boy Scout rally or meeting with the word "Jambo!" Many, at
The Scout Association Boy Scouts Association started branches itself in parts of British Empire. The Boy Scouts Association's "Headquarters" in London was renamed "Imperial Headquarters" (IHQ). The Boy Scouts International Bureau was formed in 1920 and became fully functional under the International Conference of the Boy Scout Movement in 1922. Subsequently, The Boy Scouts Association branches in the Dominions of Canada, Australia, New Zealand, Newfoundland, and South Africa were given the option of being "separately represented" with the Boy Scouts International Bureau, but chose instead to remain under IHQ control. Over time, many of the branches of The Scout Association became direct members