Noun rehearsal has 2 senses
  1. rehearsal, dry run - a practice session in preparation for a public performance (as of a play or speech or concert); "he missed too many rehearsals"; "a rehearsal will be held the day before the wedding"
    --1 is a kind of exercise, practice, drill, practice session, recitation
    --1 has particulars: dress rehearsal; run-through; walk-through
    Derived form: verb rehearse1
  2. rehearsal - (psychology) a form of practice; repetition of information (silently or aloud) in order to keep it in short-term memory
    --2 is a kind of
    exercise, practice, drill, practice session, recitation
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