LIFE What do tid mean? InsuNews May 23, 2022 What do tid mean? three times a day Medical Definition of tid three times a day —used in writing prescriptions. See also What is level term life insurance? Post navigation Previous: What does AD mean in nursing?Next: How does life insurance work in Australia? More Stories LIFE What is the average cost of a Medicare supplement plan? InsuNews May 23, 2022 LIFE What is the best life insurance to buy UK? InsuNews May 23, 2022 LIFE Do you pay tax on life insurance payout UK? InsuNews May 23, 2022