What is Signal?

Legal Definition
A word or phrase briefly indicating the relevance of one or more cited sources. In formal legal writing, a signal often appears at the start of a citation sentence.

See Order of signals for an index of different signals and their definitions.
Legal Definition
1. General. An electronic, acoustic or visual means that is used in transmitting an piece of information.2. Telecommunications. Energy that is applied to a circuit that makes it perform an action.