Dictionaries are not politically neutral. They record the popular, not the best, understanding of a thing, and they privilege the "mainstream" from the perspect

Dictionaries are not politically neutral. They record the popular, not the best, understanding of a thing, and they privilege the "mainstream" from the perspective of very white, very male, middle class academia. In practical terms, dictionaries are good at telling you what a subset of the population thinks. It's more or less argumentum ad populum, indirectly.