1) one of the tribe of Levi
2) in a narrower sense those were called Levites who, not being of the family of Aaron, for whom alone the priesthood was reserved, served as assistants to the priests. It was their duty to keep the sacred utensils and the temple clean, to provide the sacred loaves, to open and shut the gates of the temple, to sing the sacred hymns in the temple, and to do many other things.
Part of Speech: noun proper masculine
Citing in TDNT: 4:239, 530
From G3017; a Levite, that is, descendant of Levi: - Levite.
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 Λευίτης; click on the second column to search for that grammatical form of the root Λευίτης; click on the third column to search for that word and grammatical form; click on the total to search for the root Λευίτης.