pac ‧ i ‧ fist /ˈpæsəfəst, ˈpæsɪfəst/ BrE AmE noun [countable]
[ Word Family: noun : ↑ peace , ↑ peacefulness , ↑ pacifier , ↑ pacifism , ↑ pacifist ; adjective : ↑ peaceful , ↑ peaceable , ↑ pacifist ; adverb : ↑ peacefully , ↑ peaceably ; verb : ↑ pacify ]
someone who believes that wars are wrong and who refuses to use violence
—pacifist adjective [only before noun] :
the pacifist movement