Noun

(en noun)

Someone who protects or guards, by assignment or on their own initiative.

A device or mechanism which is designed to protect.

One who prevents interference.

A state or other subject under international law, exercising a protectorate over another subject in international law.

* Jon Huntsman, Jr.

I stand before you in the spirit of pure public service — not as a protector of the status quo, but as an agent of change.

(UK, historical) One having the care of the kingdom during the king's minority; a regent.

(Shakespeare)

(Roman Catholic) A cardinal, from one of the more considerable Roman Catholic nations, who looks after the interests of his people at Rome; also, a cardinal who has the same relation to a college, religious order, etc.

Noun

(en noun)

One who protests, either singly or in a public display of group feeling.

* {{quote-magazine, date=2013-06-07, author=(Gary Younge)

, volume=188, issue=26, page=18, magazine=(The Guardian Weekly) , title= Hypocrisy lies at heart of Manning prosecution , passage=The dispatches […] also exposed the blatant discrepancy between the west's professed values and actual foreign policies. Having lectured the Arab world about democracy for years, its collusion in suppressing freedom was undeniable as protesters were met by weaponry and tear gas made in the west, employed by a military trained by westerners.}}

(legal) One who protests a bill of exchange, or note.