Definition of party-liner in English:

party-liner

noun

  • A person who adheres to the policies adopted by his or her political party; a politician who rarely deviates from the party line.

Origin

Late 19th century; earliest use found in Postville (Iowa) Post. From party line + -er.

Pronunciation

party-liner

/ˌpɑːtiˌˈlʌɪnə/