Definition of "Ration" :

noun: the food allowance for one day (especially for service personnel)

"The rations should be nutritionally balanced."

noun: a fixed portion that is allotted (especially in times of scarcity)

verb: distribute in rations, as in the army

"Cigarettes are rationed."

verb: restrict the consumption of a relatively scarce commodity, as during war

"Bread was rationed during the siege of the city."