Rehearsal (rhrsa), n.
The act of rehearsing; recital; narration; repetition; specifically, a private recital, performance, or season of practice, in preparation for a public exhibition or exercise. Chaucer. In rehearsal of our Lord's Prayer. Hooker. Here's marvelous convenient place for our rehearsal. Shak. Dress rehearsal (Theater), a private preparatory performance of a drama, opera, etc., in costume.
Shades of meaning
Fernald has no entry of its own for rehearsal; he lists it under report.
He lists it without comment; the entries above explain its neighbors.