Atomic | Definition of atomic by Merriam-Webster

Full Definition of ATOMIC

1

a : of, relating to, or concerned with atoms <atomic physics>

b : nuclear 2 <atomic energy>

2

a : marked by acceptance of the theory of atomism

b : atomistic 2

3

: minute

4

of a chemical element : existing in the state of separate atoms

— atom·i·cal·ly \-mi-k(ə-)lē\ adverb

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1678

Synonyms: tiny, bitsy, bitty, infinitesimal, itty-bitty (or itsy-bitsy), little bitty, microminiature, microscopic (also microscopical), miniature, minuscule, minute, teensy, teensy-weensy, teeny, teeny-weeny, wee, weeny (also weensy)

Antonyms: astronomical (also astronomic), colossal, cosmic (also cosmical), elephantine, enormous, giant, gigantic, herculean, heroic (also heroical), huge, immense, mammoth, massive, monster, monstrous, monumental, mountainous, planetary, prodigious, titanic, tremendous

1

: of or relating to atoms <atomic physics>

2

: nuclear 3 <atomic energy>

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