say it: pref-ur-EN-shuhl
preferential is an adjective meaning "manifesting partiality". It carries one recorded sense.
manifesting partiality
“a discriminatory tax”
“preferential tariff rates”
“preferential treatment”
“a preferential shop gives priority or advantage to union members in hiring or promoting”
Definitions, synonyms and semantic relations for preferential come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.