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 the Goodman rule? Post navigation Previous: What does AD mean in nursing?Next: How does life insurance work in Australia? More Stories LIFE What is the richest insurance company in the United States? InsuNews May 23, 2022 LIFE Who is the biggest insurance underwriter for? InsuNews May 23, 2022 LIFE What is whole term life insurance? InsuNews May 23, 2022