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 of cosmic

• giant
• gigantic
• huge
• vast
• tremendous
• enormous
• massive
• colossal
• astronomical
• mammoth
• monumental
• bumper
• immense
• titanic
• galactic
• monster
• planetary
• monstrous
• mountainous
• grand
• oceanic

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

But in the meantime, before all these cosmic, life-and-death questions can be answered, this episode of Lanterns makes for a meaningful memorial to a deeply imperfect hero. — Siddhant Adlakha, Vulture, 21 Sep. 2026

This will be amplified by the other cosmic forces set to unfold before us. — Kyle Thomas, PEOPLE, 20 Sep. 2026

Sometimes a starship encounters a cosmic entity that — for some hard-to-fathom reason — chooses to study lesser mortals by forcing them into a big old game of dress-up. — Richard Edwards, Space.com, 17 Sep. 2026

There, the discovery of a spacecraft and additional extraterrestrials transforms their chase into a simple struggle for survival, as what began as a series of understandable misjudgments spirals into a tragedy of cosmic scale. — Patrick Brzeski, HollywoodReporter, 16 Sep. 2026

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