Coordinated Universal Timeco·or·di·nat·ed universal time
Universal Time as periodically adjusted to coordinate with atomic clocks: it serves as the official international basis for standard time: abbrev. UTC
coordinated universal time
An international time standard calculated by atomic clock and incorporating occasional leap seconds to compensate for changes in the rotation of the earth. Coordinated universal time serves as the basis for standard time around the world.
- A high-precision atomic time standard (abbreviation UTC)