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 held in Olympia, London in 1920 together with an international conference for leaders which founded the World Organization of the Scout Movement of which The Boy Scouts Association was a founding member. Baden-Powell continued to guide the Scouts and Girl Guides, going on world tours throughout the rest of his life until ill health caused him to retire to Kenya in 1938 where he died on 8 January 1941. "The Boy Scouts Headquarters Gazette" was first published in July 1909, as the official publication of the association for adult Scouters and administrators, alongside "The Scout", a magazine for youth members