revision date. noun. The definition of a revision date is the day when a change was made.Click to see full answer. Also asked, does Rev mean expiration date?Rev = revised. That is the month/year the label used on the bottle was last revised by the manufacturer and approved by the FDA.Subsequently, question is, what does rev mean on a prescription? Page 3. 10 – Medication Therapy Management and Quality Improvement Program. (Rev. Simply so, what does rev mean? Rev., an abbreviation for revolutions, as in revolutions per minute.What does rev mean in accounting?Revenue. Business » Accounting — and more Rate it: REV. Reverend.