prel·ude/`prɛljud; ˈpreljuːd/ n 1 be a prelude to sth to happen just before something else, often as an introduction to it 是某事的序幕［前奏、开端］: The attack may be a prelude to full-scale war. 这次袭击可能是全面战争的序幕。 2 [C] a short piece of music that comes before a longer musical piece 序曲，前奏曲