Dictatorial

Dic`ta*to"ri*al (?), a. [Cf. F. dictatorial.] 1. Pertaining or suited to a dictator; absolute.

Military powers quite dictatorial.
W. Irving.

2. Characteristic of a dictator; imperious; dogmatical; overbearing; as, a dictatorial tone or manner.

-- Dic`ta*to"ri*al*ly, adv. -- Dic`ta*to"ri*al*ness, n.