union label definition by American Heritage Dictionary
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
An identifying mark attached to a product indicating it has been produced by members of a trade union.
union label - Business Definition
An attachment or mark that identifies a product as being produced by union labor. The label is useful for consumers who wish to buy (or not buy) because of the manufacturer's affiliation (nonaffiliation) with a union.