Definition of palliament in US English:

palliament

noun

rare, archaic
  • A gown, a long robe; specifically the white gown of a candidate for the Roman consulship.

Origin

Late 16th century; earliest use found in George Peele (bap. 1556, d. 1596), poet and playwright. From post-classical Latin palliare to cloak + -ment, after classical Latin pallium cloak.

Pronunciation

palliament

/ˈpalɪəm(ə)nt/