Definition of locustian in US English:

locustian

adjective

rare
  • Of, relating to, or characteristic of a locust or locusts.

Origin

Early 18th century; earliest use found in Thomas Ken (1637–1711), bishop of Bath and Wells and nonjuror. From locust + -ian.

Pronunciation

locustian

/ləʊˈkʌstɪən/