Signal, signals, signaling, or signalling may refer to:
Scientific concepts
- Signal (electrical engineering), a physical quantity that can carry information.
- Signal processing, the field of techniques used to extract information from signals
- Cell signaling, in biology, the system of communication that governs basic cellular activities and coordinates cell actions
- Signal (biology), an electrochemical communication activity in an organism
- Two theories in different disciplines of "honest signalling" when deception may be incentivized:
- Signalling game, signalling theories in evolutionary biology and economics expressed in terms of game theory
Computing:
Communications
Names
Other
- Any implicit, subtle, or disguised message, in situations such as:
- Signals in legal citations
- Kent (game) a card game also known as Signal or Kemp
See also