| Meaning | Greenwich Mean Time updated with leap seconds. |
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| Synonym | UTC |
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| Narrower | Earth-received time, ERT | The coordinated universal time when an event is received on Earth |
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| spacecraft event time, SCET | The coordinated universal time on board the spacecraft |
| transmission time, TRM | The coordinated universal time when a transmission is sent from Earth to a spacecraft or other celestial body |
| Broader | Greenwich Mean Time, Greenwich Time, GMT, universal time, UT, UT1 | The local time at the 0 meridian passing through Greenwich, England |
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| Spanish | UTC |
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| Catalan | temps universal coordinat |
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