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

The Red Hand League The team of cosmic detectives suggests that a defining factor in the make-up of ILTRs could be a dense shroud of gas and dust that surrounds the progenitor stars. —Robert Lea, Space.com, 26 Mar. 2025

Here's a recap of the April 2024 total solar eclipse, and how this weekend's partial cosmic event will be a bit different. —Eric Lagatta, USA Today, 26 Mar. 2025

Their will-they-won't-they romance (now officially canon in the comics and on the Max series Harley Quinn) feels like a long-overdue cosmic alignment. —James Mercadante, EW.com, 26 Mar. 2025

The cosmic whirlpool was captured in stunning video and appears to have been created by the SpaceX Falcon 9 rocket booster falling back toward Earth, according to experts. —Michael Dorgan, Fox News, 25 Mar. 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