From Longman Dictionary of Contemporary EnglishRelated topics: Mailpostalpost‧al /ˈpəʊstl $ ˈpoʊs-/ adjective [only before noun]1TCMrelating to the official system which takes letters from one place to another
the U.S. postal servicepostal workers
an increase in postal charges2relating to sending things by post
Candidates are chosen by a postal ballot of all party members.postal vote British English
Housebound voters should register early for a postal vote.3 →go postalExamples from the Corpuspostal• Should both sides of a case be heard before the postalballot?• Data was collected using a postalquestionnaire sent to just over 3,000 people in two regions - Bristol and Manchester.• Internalprinting and postalservices were reviewed during the year and a reduction from four to three staff was made.• To maintainrapport in a postalsurvey we must always put ourselves in the position of the respondent.• Also patron of clerics, messengers, postalworkers, radio workers, stampcollectors, telecommunications workers, and television workers.• postal workerspostal workers• Also patron of clerics, diplomats, messengers, postal workers, radio workers, telecommunications workers, and television workers.• The five unions who called the indefinitestrike said up to 80 percent of postal workersstayed away from work in some areas.postal vote• Only one had a postal vote.• Voluntarypatients can register on the electoralroll and can have postal votes.• Something similar may also have happened in Martincounty, where 9,770 postal votes are at stake.• Telephonecanvassing, postal votes, the partymachine at Labour's Millbank headquarters had all the answers.From Longman Business Dictionarypostalpost‧al /ˈpəʊstlˈpoʊs-/ adjective [only before a noun]connected with the official system of sending and receiving letters, parcels etcstrikes by postal workersThePostal Service (=official system for delivering letters, parcels etc in the United States) has seen a significantly better financial performance.