small indefinite amount smal·lin·de·finiteamount uncommon noun 1. an indefinite quantity that is below average size or magnitude Synonymssmall indefinite quantitysmall indefinite amount Related words Broader terms indefinite quantity Narrower terms helpingtastecrumbdabspotfewhair's-breadthmodicum WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.