1.
pronoun
A grammatical term for a word that takes the place of a noun, such as これ, それ, 彼, 私.
2.
byword, synonym, epitome
Something so closely associated with a quality or concept that it serves as a representative example. Used figuratively to mean "the very definition of" something.
Sense 1 is the grammatical term. Sense 2 is a common figurative usage meaning "the epitome of" or "synonymous with."
Common collocations
The figurative sense 2 is very common in journalism and everyday speech. The pattern 〜の代名詞 means something is so representative of a concept that merely mentioning it evokes that concept.
Related Words
Related:
二人称 (second person (grammatical))