Lewis & Short

praemūnītĭo, ōnis, f. [praemunio, II. B.], a fortifying or strengthening beforehand.

  1. I. In gen., Ambros. de Isaac et Anim. 4, 37.
  2. II. Trop., rhet. t. t., = πρὀ παρασκευή, of an orator, who prepares the minds of his hearers for what he has further to say, a preparation, premunition: sine ullā praemunitione orationis, Cic. de Or. 2, 75, 304; 3, 53, 204; Quint. 9, 2, 17.