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

• astronomical
• astronomic
• Brobdingnagian
• bumper
• colossal
• cyclopean
• elephantine
• enormous
• galactic
• gargantuan
• giant
• gigantesque
• gigantic
• grand
• herculean
• heroic
• heroical
• Himalayan
• huge
• humongous
• humungous
• immense
• jumbo
• king-size
• king-sized
• leviathan
• mammoth
• massive
• mega
• mighty
• monster
• monstrous
• monumental
• mountainous
• oceanic
• pharaonic
• planetary
• prodigious
• super
• super-duper
• supersize
• supersized
• titanic
• tremendous
• vast
• vasty
• walloping
• whacking
• whopping

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

Its serious tone and fantastic sci-fi episodes of derelict spacecraft, cosmic viruses, and exotic aliens were a revelation for its time. —Jeff Spry, Space.com, 1 May 2025

Stars and planets are born inside swirling clouds of cosmic gas and dust that are brimming with hydrogen and other molecular ingredients. —Katrina Miller, New York Times, 29 Apr. 2025

Paired with Mars in Leo, this shift is a cosmic Red Bull. —Dossé-Via Trenou, Refinery29, 29 Apr. 2025

One of the most momentous cosmic events of the month happens during the last week of the month too, and that’s when your stern ruling planet Saturn shifts into Aries on May 24. —Nina Kahn, StyleCaster, 28 Apr. 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