1a. The act of protecting. b. The condition of being protected. 2. One that protects. 3. A pass guaranteeing safe-conduct to travelers. 4. A system of tariffs or other measures protecting domestic producers from foreign competition. 5. A contraceptive or barrier that lowers the risk of pregnancy or infection, especially a condom. 6.Slanga. Money extorted by racketeers threatening violence for nonpayment. b. Bribes paid to officials by racketeers for immunity from prosecution.