cosmic

adjective

cos·​mic ˈkäz-mik 

variants or less commonly cosmical

ˈkäz-mi-kəl 

1

a

: of or relating to the cosmos, the extraterrestrial vastness, or the universe in contrast to the earth alone

cosmic radiation

b

: of, relating to, or concerned with abstract spiritual or metaphysical (see metaphysical sense 2) ideas

cosmic wisdom

2

: characterized by greatness especially in extent, intensity, or comprehensiveness

a cosmic thinker

a book of cosmic significance

cosmically

ˈkäz-mi-k(ə-)lē 

adverb

Synonyms

• monster
• monumental
• titanic
• giant
• monstrous
• galactic
• planetary
• tremendous
• huge

Examples of cosmic in a Sentence

The discovery caused a cosmic shift in people's views of the world.

predicted that the war would forever be regarded as a cosmic error

Recent Examples on the Web

Indeed, the footage of the cluster of cells meeting the uterus looks like a mini cosmic explosion. —Leslie Katz, Forbes.com, 17 Aug. 2025

Or, alternatively, dark matter could be a type of particle created by a form of Hawking radiation on the cosmic horizon. —Keith Cooper, Space.com, 15 Aug. 2025

The research, set to be published in The Planetary Science Journal, aims to put these cosmic risks into a clearer perspective and highlight the importance of planetary defense initiatives. —Maria Morava, MSNBC Newsweek, 15 Aug. 2025

At any rate, being able to planet hunt in such close (in cosmic terms) proximity is heartening to scientists. —David Szondy august 14, New Atlas, 14 Aug. 2025

Word History

Etymology

Greek kosmikos, from kosmos order, universe

First Known Use

1685, in the meaning defined at sense 1a

Phrases Containing cosmic

• cosmic background radiation
• cosmic dust
• cosmic microwave background
• cosmic noise
• cosmic ray
• cosmic string

Rhymes for cosmic

• osmic
• microcosmic

Kids Definition

cosmic

adjective

cos·​mic ˈkäz-mik 

1

: of or relating to the cosmos

cosmic theories

2

: extremely vast : grand

cosmic dimensions