Burden (music) definition

(1) Weight to be borne or conveyed

(2) An onerous or difficult concern

"The burden of responsibility"

"That's a load off my mind"

(3) The central idea that is expanded in a document or discourse

(4) The central meaning or theme of a speech or literary work

(5) Impose a task upon, assign a responsibility to

"He charged her with cleaning up all the files over the weekend"

(6) Weight down with a load