doer Copy link Outline 1. actor2. auctor (rare in this sense)3. factor (not class. in this sense)4. more freq. expr. by verb • doer: 1. actor: a d. of deeds, a. rerum, Cic. 2. auctor (rare in this sense): the narrator and the d., scriptor et auctor rerum, Sall. 3. factor (not class. in this sense): the d. of the work, f. operis, Vulg. Jac. 1, 25. 4. more freq. expr. by verb: the d.s of great deeds, qui magna (magnas res) fecerunt, etc.