1) a priest, one who offers sacrifices and in general in busied with sacred rites
1a) referring to priests of Gentiles or the Jews
2) metaphorically of Christians, because, purified by the blood of Christ and brought into close intercourse with God, they devote their life to him alone and to Christ
Part of Speech: noun masculine
Citing in TDNT: 3:257, 349
From G2413; a priest (literally or figuratively): - (high) priest.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root ἱερεύς; click on the second column to search for that grammatical form of the root ἱερεύς; click on the third column to search for that word and grammatical form; click on the total to search for the root ἱερεύς.