Fifth columnist

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    someone who belongs to a group that secretly undermines another organization

    "In both cases audiences can listen to the characters and actually hear them simply because both characters are not who they seem to be; they are fifth column-ists, interlopers in the battlefield of sexual politics. If a homosexual character or a real woman gave the speeches that Andrews and Hoffman gave they would be written off as crackpots by the movie-going public."

  2. 2
    a member of a clandestine subversive organization who tries to help a potential invader wordnet

Example

More examples

"In both cases audiences can listen to the characters and actually hear them simply because both characters are not who they seem to be; they are fifth column-ists, interlopers in the battlefield of sexual politics. If a homosexual character or a real woman gave the speeches that Andrews and Hoffman gave they would be written off as crackpots by the movie-going public."

Etymology

From fifth column + -ist.