'trademark' definitions:

Definition of 'trademark'

From: WordNet
noun
A distinctive characteristic or attribute [syn: hallmark, trademark, earmark, stylemark]
noun
A formally registered symbol identifying the manufacturer or distributor of a product
verb
Mark with a brand or trademark; "when this product is not branded it sells for a lower price" [syn: brand, trademark, brandmark]
verb
Register the trademark of; "The company trademarked their new gadget"

Synonyms of 'trademark'

From: Moby Thesaurus