| Noun | 1. | be-all and end-all - the essential factor; the all-important element; the supreme aim; "profit is the be-all and end-all of business" component, element, factor, ingredient, constituent - an abstract part of something; "jealousy was a component of his character"; "two constituents of a musical composition are melody and harmony"; "the grammatical elements of a sentence"; "a key factor in her success"; "humor: an effective ingredient of a speech" |