LABEL

noun

1. A small ticket or sign giving information about something to which it is attached or intended to be attached.
2. A name given to something or someone to categorise them as part of a particular social group.
3. A company that sells records.

verb

1. To put a label (a ticket or sign) on (something).
2. (ditransitive) To give a label to (someone or something) in order to categorise that person or thing.
3. 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.