the skilled practice of a practical occupation | measuring the depths of the oceans |
the business given to a commercial establishment by its customers | the occupation of a plumber (installing and repairing pipes and fixtures for water or gas or sewage in a building) |
a particular instance of buying or selling | utility consisting of the pipes and fixtures for the distribution of water or gas in a building and for the disposal of sewage |
an equal exchange | |
the commercial exchange (buying and selling on domestic or international markets) of goods and services | |
people who perform a particular kind of skilled work | |
steady winds blowing from east to west above and below the equator | |