signal /sigˈnl/

1. A token
2. An intimation, eg of warning, conveyed over a distance
3. A transmitted effect conveying information
4. The apparatus used for the purpose
5. A piece of play intended to give information to one's partner (cards)
6. An intimation of, or event taken as marking, the moment for action
7. An initial impulse

1. To intimate, convey, or direct by signals
2. To signalize

To make signals

1. Remarkable
2. Notable

sigˈnalize or sigˈnalise transitive verb

To mark or distinguish signally

sigˈnaller or (US) sigˈnaler noun

sigˈnalling or (US) sigˈnaling noun

sigˈnally adverb

Notably

signal box noun

A railway signalman's cabin or an automatic or semi-automatic control point for the signals for all railway lines in a section

signal letters plural noun (nautical)

Four letters by which an individual ship may be identified

sigˈnalman noun

1. A person who transmits signals
2. A person who operates railway signals

signal peptide noun

A short N-terminal peptide sequence involved in the passage of a protein across a membrane (also signal sequence)

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