Definition of decisory in US English:

decisory

adjective

  • That settles or determines a matter; decisive, determinative.

Origin

Late 16th century. From post-classical Latin decisorius decisive from classical Latin dēcīs-, past participial stem of dēcīdere + -ōrius.

Pronunciation

decisory

/dɪˈsʌɪz(ə)ri/