Trade mark for a coffee substitute invented by C. W. Post and made with chicory and roasted grains(noun)
WordNet. Princeton University. 2010.
Use "postum" in a sentence
"Mrs. Martin used to empty her postum jar and fill it with Folgers Coffee, I guess thinking that she was fooling whoever was looking, which really wasn't anybody, maybe God, but wouldn't he have known anyway?"
"Coffee or postum with cream or sugar _or_ 10 ozs. skim milk"
"Buttermilk is excellent, and so is postum, but the postum should be taken without sugar and used with hot skimmed milk, not cream."