prəˈtestə(r), (ˈ)prō|t- noun
( -s )
1. obsolete : one that makes an affirmation
state with ordinary oaths my love to every new protester — Shakespeare
2. : one that disagrees or disapproves
all their friends were protesters and rebels and seceders — H.G.Wells
even the town protester thinks of things he would have liked in school — Education Digest
3. usually capitalized : one of a party among the Covenanters that protested against the resolution of 1650 that all persons not professed enemies to the Covenant or excommunicated should be allowed to serve in the army — compare resolutioner
4. : one that protests a bill of exchange or a note