large indefinite quantity lar·gein·de·finitequantity uncommon noun 1. an indefinite quantity that is above the average in size or magnitude Synonymslarge indefinite quantitylarge indefinite amount Related words Broader terms indefinite quantity Narrower terms busloadbarrelsbatchbattalionbillyoboatloadinfinitudemaximum WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.