Definitions for "Dead drop"
a drop used for the clandestine exchange of intelligence information; "a dead drop avoids the need for an intelligence officer and a spy to be present at the same time"
a place or an event at which agents have arranged to exchange communication or objects without ever meeting one another
a prearranged hidden location used for the clandestine exchange of packages, messages, and payments, which avoids the necessity of an intelligence officer and an agent being present at the same time
A secret location where materials can be left in concealment for another party to retrieve. This eliminates the need for direct contact in hostile situations.