All 5 Uses

conscience
in
Fahrenheit 451
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"What" asked Montag of that other self, the subconscious idiot that ran babbling at times, quite independent of will, habit, and conscience.†
p. 8.8

conscience = feeling or appraisal of having personally behaved in a morally right or wrong manner
You got a guilty conscience about something?†
p. 25.4
And since things really couldn't be hurt, since things felt nothing, and things don't scream or whimper, as this woman might begin to scream and cry out, there was nothing to tease your conscience later.†
p. 34.2
His hand had done it all, his hand, with a brain of its own, with a conscience and a curiosity in each trembling finger, had turned thief.†
p. 35.1 *
For these were the hands that had acted on their own, no part of him, here was where the conscience first manifested itself to, snatch books, dart of with Job and Ruth and Willie Shakespeare, and now, in the firehouse, these hands seemed gloved with blood.†
p. 101.9

Definitions:

(1) (conscience)
feeling or judgment of morally right or wrong personal behavior
(2) (meaning too rare to warrant focus)