collier

noun6

1. •
   (old-fashioned, historical) A person in the business or occupation of producing or distributing coal (any of several types of carbon fuel).
2. •
   (old-fashioned, historical) A person who produces (e.g., digs, mines, gathers) or sells coal (the fossil fuel type), or transports it from underground, from the soil, or from a seashore.

   • The Black Dwarfs wear black jackets and caps, are not handsome like the others, but on the contrary are horridly ugly, with weeping eyes, like blacksmiths and colliers. — 1828
3. •
   (old-fashioned, historical) A person in the business or occupation of producing (and selling) charcoal.

   • For this reason, the collier took constant care to keep the covering of earth in good order. — 1957
4. •
   A vessel carrying a bulk cargo of coal.

   • By 1830, more than two million tons of coal a year, principally from the North East, arrived in London by coastal collier, and that figure reached three million tons by the 1840s. — 2021
5. •
   A sailor on such a vessel.
6. •
   (slang) A non-traveller.