Definition of post-velar in US English:

post-velar

adjective

  • Anatomy behind or at the back of the velum or soft palate; specifically (Phonetics) articulated with the tongue against the rear half of the velum or soft palate.

noun

  • Phonetics any of the sounds produced in this way.

Origin

1930s; earliest use found in Webster's New International Dictionary of the English Language.