Definition of dictionarial in US English:

dictionarial

adjective

rare
  • Relating to, of the nature of, or characteristic of a dictionary; lexicographical.

Origin

Mid 18th century; earliest use found in Batty Langley (c1696–1751), writer on architecture. From dictionary + -al.

Pronunciation

dictionarial

/ˌdɪkʃəˈnɛːrɪəl/