The term "final approval" refers to the last stage in a process where an item, idea or proposal is reviewed and given the green light for implementation. It means that all necessary steps have been taken, and there are no more obstacles preventing the project from moving forward. In other words, it's the final hurdle before something can be officially started or completed. The phrase is often used in business settings when a decision-maker needs to sign off on a proposal before it can be put into action.