Definition of "farmer"

(agent noun) Someone or something that farms, as:

1. A person who works the land and/or who keeps livestock; anyone engaged in agriculture on a farm.  quotations  examples

   Quotations

   • A farmer could place an order for a new tractor part by text message and pay for it by mobile money-transfer. A supplier many miles away would then take the part to the local matternet station for airborne dispatch via drone.

     2012 December 1, “An internet of airborne things”, in The Economist‎, volume 405, number 8813, page 3 (Technology Quarterly)

2. (strictly, especially Britain) More specifically, a farm owner, as distinguished from a farmworker or farmhand as a hired employee thereof.  examples

(historical) One who takes taxes, customs, excise, or other duties, to collect for a certain rate per cent.

(historical, mining) The lord of the field, or one who farms the lot and cope of the crown.

(Singapore, slang) A regular person; someone who did not receive a prestigious scholarship.

(dated) A baby farmer (operator of a rural orphanage).  examples