All 5 Uses

convention
in
Unbroken - adapted for young adults
(Edited)

The 1929 Geneva Convention, an international agreement concerning POWs, allowed detaining countries to use prisoners for labor.†
p. 176.6
Japan mocked the Geneva Convention, enslaving POWs to support its war effort, forcing them into labor so harsh they died by the thousands.†
p. 176.9
The only aspect of the Geneva Convention that the Japanese sometimes heeded was the prohibition on forcing POW officers to work.†
p. 177.1
When the first officer said this violated the Geneva Convention, the Bird swung his kendo stick into the man's head.†
p. 179.3 *
Though this violated the Geneva Convention, Fitzgerald knew it would keep his officers away from the Bird and couldn't be anything like the killing labor done by the enlisted men.†
p. 202.7

Definitions:

(1) (convention as in: teacher's convention)
a large conference or meeting
(2) (convention as in: conventional behavior)
something regarded as normal or typical
(3) (convention as in: The Geneva Convention)
a written international agreement
(4) (meaning too rare to warrant focus)