Cosmic means to do with the universe, or vast beyond measure. Cosmic rays, on a cosmic scale, cosmic significance.
Cosmic rays are the technical use: high-energy particles arriving from space, which strike the atmosphere constantly. The loose sense means enormous, and cosmic in that use has drifted a long way from astronomy and into advertising.
1adjectivecosmicTo do with the universe, or vast beyond measure.
“Astronomers study cosmic events such as the birth of stars.”
cosmic is a quality.
Ancient Greek
κοσμικός
English, today
cosmic
Borrowed from Ancient Greek κοσμικός.
Etymology from Wiktionary, CC BY-SA