All 4 Uses

ration
in
Hiroshima, by John Hersey
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To make matters worse, he had suffered for two days, along with Father Cieslik, a fellow-priest, from a rather painful and urgent diarrhoea, which they blamed on the beans and black ration bread they were obliged to eat.†
Chpt 1
Satisfied that nothing would happen he went in and breakfasted with the other Fathers on substitute coffee and ration bread, which, under the circumstances, was especially repugnant to him.†
Chpt 1
He saw a ration stand at one side of the field, and he went to it and begged some rice and biscuits, and he took them back, in lieu of doctors, to the people in the park.†
Chpt 3 *
He had cirrhosis of the liver, and had been warned not to accept the daily ration of five ounces of distilled spirits that the Garden of St. Joseph mercifully issued to the former miners.†
Chpt 5

Definitions:

(1) (ration)
a fixed share of something, especially scarce goods like food or fuel; or to limit and distribute something in fixed shares
(2) (meaning too rare to warrant focus)