To put a label (a ticket or sign) on (something).
The shop assistant labeled all the products in the shop.
(ditransitive) To give a label to (someone or something) in order to categorise that person or thing.
He's been unfairly labeled as a cheat, although he's only ever cheated once.
To replace specific atoms by their isotope in order to track the presence or movement of this isotope through a reaction, metabolic pathway or cell.
To add a detectable substance, either transiently or permanently, to a biological substance in order to track the presence of the label-substance combination either in situ or in vitro
Having a label, tagged.
The butterfly collection had each specimen labelled with the scientific name on a little piece of paper.
Defined or described (as).
He was labelled a racist for his remarks.