The Levite reference article from the English Wikipedia on 24-Apr-2004
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Levite

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In the Jewish tradition, a Levite is a member of the Hebrew tribe of Levi. The Levites were the only one of the Israelite tribes who had no tribal land, and served particular religious duties for the Israelites. In return, the landed tribes were expected to give tithe to the Levites.

A subsection of the Levite tribe, the descendants of Aaron   —   the Kohanim, had the special role as priests in the Temple in Jerusalem. Non-Kohen Levites assisted in these services.