Lewis & Short

dīrectĭo, ōnis, f. [dirigo] (a very rare word).

  1. I. A making straight or even, a levelling: plana coagmentorum, Vitr. 7, 3, 5 sq.
    1. B. Concr., a straight line, App. de Mundo, p. 57.
  2. II. Trop.
    1. A. A directing, aiming, towards any thing: quaedam rationis ad veritatem, Quint. 3, 6, 30.
    2. B. Righteousness, uprightness, Vulg. Psa. 44, 6; 118, 7.