Lights out
Signal and lights out are semantically related. In some cases you can use "Signal" instead a noun phrase "Lights out".
Signal
Signal noun - An object intended to give public notice or warning.
Lights out and signal are semantically related. Sometimes you can replace phrase "Lights out" with "Signal", this terms are similar.
Both terms in one sentence
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Crucified Hero Shot: Episodes 39 and 40, complete with Eye Lights Out after sending a beacon signal to Space Station V3 so that his teammates could find him.
Source: Series / Ultra Seven
Cite this Source
Signal and Lights out. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/lights_out/signal
Lights out & Signal. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/lights_out/signal>.
Signal or Lights out. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/lights_out/signal.
Google Ngram Viewer shows how "lights out" and "signal" have occurred on timeline