objector

plural objectors

1. A person who objects to something.

   "It would be amusing, sir, to shut these various objectors up in a room and let them settle it among themselves."

   1925 July – 1926 May, A[rthur] Conan Doyle, “(please specify the chapter number)”, in The Land of Mist (eBook no. 0601351h.html), Australia: Project Gutenberg Australia, published April 2019

   2 more examples

   The Fife County Council, and other objectors, were successful in July [1950] in obtaining an interim interdict against this decision, but the Court of Session withdrew the interdict in January, and it was then stated that a civil court had no jurisdiction in the matter.

   1951 April, “Notes and News: North Fife Line, Scotland”, in Railway Magazine, number 600, page 281

   But almost always such words are irreversibly established before the objectors learn of their existence, and the objections are hardly more than academic exercises.

   1985, Robert Burchfield, The English Language, Oxford: Oxford University Press, page 112

   Synonyms: objectant