signal

1. signal (noun) — sense 1

Definition: A sequence of states representing an encoded message in a communication channel.

2. signal (noun) — sense 2

Definition: Any variation of a quantity or change in an entity over time that conveys information upon detection.

3. signal (noun) — sense 3

Definition: A sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action.

Example: All obeyed / The wonted signal and superior voice / Of this great potentate.

4. signal (verb) — sense 4

Definition: To indicate; to convey or communicate by a signal.

Example: I signalled my acquiescence with a nod.

5. signal (verb) — sense 5

Definition: To communicate with (a person or system) by a signal.

Example: Seeing the flames, he ran to the control room and signalled headquarters.

6. signal (adj) — sense 6

Definition: Standing above others in rank, importance, or achievement.

Example: a signal exploit; a signal success; a signal act of benevolence