Overproduction is making more of something than people want or need — more cars, more milk, more plastic toys than buyers will take. The extra sits in warehouses, prices often fall, and farmers or factories can lose money even though they worked hard. You will meet the word in economics, farming news, and factory talk. The verb is overproduce; a factory that overproduces ends up with overproduction. Though actually, “too much” depends on the moment: the same number of phones can be just right at New Year and overproduction in a quiet month. It is not a word for one person cooking too much soup; keep it for goods made for a market. The opposite idea is underproduction — not making enough.