Guiding or directing; directive.n. A guide; a rule to direct; particularly (ecclesiastical), a book of directions for saying the various church offices and for finding the changes in them required by the calendar; especially, in medieval English usage, a book of directions for saying the hours. Also called ordinal, pica, or pie. The directory of the Greek Church is called the typicum.n. Specifically A book containing an alphabetical list of the inhabitants of a city, town, district, or the like, with their occupation, place of business, and abode.n. A board of directors; a directorate. Specificallyn. [capitalized] The body constituting the executive in France during a part of the revolutionary epoch, consisting of five members called directors, one of whom retired each year.