All 5 Uses

grand jury
in
Light in August
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Grand jury meets today.†
Chpt 17 *

grand jury = a group of citizens who decide whether there is enough evidence to formally accuse someone of a crime
WHEN Byron reached town he found that he could not see the sheriff until noon, since the sheriff would be engaged all morning with the special Grand Jury.†
Chpt 18
Beneath them, steady and constant and with a grave purposelessness (and with here and there, standing motionless or talking to one another from the sides of their mouths, some youngish men, townsmen, some of whom Byron knew as clerks and young lawyers and even merchants, who had a generally identical authoritative air, like policemen in disguise and not especially caring if the disguise hid the policeman or not) countrymen in overalls moved, with almost the air of monks in a cloister, speaking quietly among themselves of money and crops, looking quietly now and then upward at the ceiling beyond which the Grand Jury was preparing behind locked doors to take the life of a man whom few of them†
Chpt 18
He knew that by night the Grand Jury would have indicted Christmas, and Brown—or Burch—would be a free agent save for his bond to appear as a witness at next month's court.†
Chpt 18
About the square it was already known that the special Grand Jury would meet tomorrow.†
Chpt 19

Definitions:

(1) (grand jury)
a group of citizens who decide if there is enough evidence to formally accuse someone of a crime
(2) (meaning too rare to warrant focus)