QID Views 8 meanings found QID is most frequently used in medical prescriptions to indicate a dosage taken four times daily, and it also appears in corporate contexts as an abbreviation for quality‑inspection units. Medical Quater In Die (Four Times a Day) Miscellaneous Quake Imperial Dog Quater In Die Quality Inspection Department Computing Quake Imperial Descendants Quad Information Display Business Quality Insights of Delaware Quality Inspection Directorate