Sentence:  The young man achieved perfect timing, for the last word of his <WSD>peroration</WSD> coincided with the muffled clap of the doors closing, after having launched the coffin onto the rails of a subterranean railway. 
Meaning of the word marked with <WSD> tags:  The concluding section of a discourse, either written or oral, in which the orator or writer sums up and commends his topic to his audience, particularly as used in the technical sense of a component of ancient Roman oratorical delivery.