min·is·ter 
(mĭnĭ-stər)
(mĭnĭ-stər)n.
1.
a. One who is authorized to perform religious functions in a Christian church, especially a Protestant church.
b. Roman Catholic Church The superior in certain orders.
2. A high officer of state appointed to head an executive or administrative department of government.
3. An authorized diplomatic representative of a government, usually ranking next below an ambassador.
4. A person serving as an agent for another by carrying out specified orders or functions.
v. min·is·tered, min·is·ter·ing, min·is·ters
v.intr.
1. To attend to the wants and needs of others: Volunteers ministered to the homeless after the flood. See Synonyms at tend2.
2. To perform the functions of a cleric.
v.tr.
To administer or dispense (a sacrament, for example).
[Middle English ministre, from Old French, from Latin minister, servant; see mei-2 in the Appendix of Indo-European roots.]