Sentence:  'I believe you've killed that constable in the exercise of his duty, Sir; the man's dead,' said Lowe, sternly./ 'Another gloss on my text; why invade me like housebreakers?' said Dangerfield with a grim <WSD>scoff</WSD>. 
Meaning of the word marked with <WSD> tags:  Derision; ridicule; a derisive or mocking expression of scorn, contempt, or reproach.