[ uh-tom-ik ]
See synonyms for atomic on
  1. of, pertaining to, resulting from, or using atoms, atomic energy, or atomic bombs: an atomic explosion.

  2. propelled or driven by atomic energy: an atomic submarine.

  1. Chemistry. existing as free, uncombined atoms.

  2. extremely minute.

Origin of atomic

First recorded in 1670–80; atom + -ic
  • Also a·tom·i·cal .

Other words from atomic

  • a·tom·i·cal·ly, adverb
  • non·a·tom·ic, adjective
  • non·a·tom·i·cal, adjective
  • non·a·tom·i·cal·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use atomic in a sentence

  • The coloring material is atomically constituted to act as a temporary disk while the tourist is among us.

    The Instant of Now | Irving E. Cox, Jr.

British Dictionary definitions for atomic


/ (əˈtɒmɪk) /

  1. of, using, or characterized by atomic bombs or atomic energy: atomic warfare

  2. of, related to, or comprising atoms: atomic hydrogen

  1. extremely small; minute

  2. logic (of a sentence, formula, etc) having no internal structure at the appropriate level of analysis. In predicate calculus, Fa is an atomic sentence and Fx an atomic predicate

Derived forms of atomic

  • atomically, adverb

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for atomic


[ ə-tŏmĭk ]

  1. Relating to an atom or to atoms.

  2. Employing nuclear energy.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.