Approval, or permission to proceed.
A go-ahead to commit a crime, specifically to carry out a hit on someone (i.e. to kill).
A traffic light in its green state (indicating that vehicles may proceed).
A person or organisation that approves, routinely or as a formality, matters decided by some other person or organisation.
A piece of rubber or similar material with a design or text carved or molded for the purpose of transferring ink or dye to imprint that design on another object.
Of a person, organisation, or process, making decisions or approving matters routinely or without real power.
To process, approve or decide matters routinely rather than through careful consideration.