Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
priority [praɪˈɔrɪtɪ] n (most urgent task) первоочередна́я зада́ча; (most important thing, task) приорите́т
to have priority (over) име́ть (impf) преиму́щество (пе́ред +instr)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.