postal order is a noun meaning "a written order for the payment of a sum to a named individual; obtainable and payable at a post office". It carries one recorded sense.
a written order for the payment of a sum to a named individual; obtainable and payable at a post office
Definitions, synonyms and semantic relations for postal order come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.