də̇|rek|tōrēəl, |dīˌr-, -tȯr- adjective
Etymology: Late Latin directori us + English -al — more at directory
1. : serving to direct : directive , directory
reading directorial books in preparation for citizenship
how far the council shall go in exercising these directorial powers — J.E.Pate
2.
a. : belonging to or having the function or qualities of a director
his earlier directorial assignments
employed in a directorial position at a large automobile plant — Paul Moor
b. : adapted to or connected with the direction or directorship of dramatic or theatrical production
a new directorial genius
richly fulfilling his high directorial promise
: characteristic of a skilled director
an ambitious melodrama bristling with fine directorial touches — Time
3.
[French, from Late Latin directorius (influenced in meaning by French Directoire, 18th century executive body) + French -al — more at directoire ]
: belonging to a directory or body of directors : done, constituted, or administered by a directory
during the period France was under directorial government