What does atomically mean?
"Atomically" is an adverb with two distinct but related senses. Its older sense belongs to physics and chemistry: something done or considered atomically happens at the level of atoms — for instance, describing how materials behave when examined or manipulated atom by atom. Its second sense, now dominant in technology contexts, comes from computer science: an operation performed atomically is indivisible, meaning it either completes entirely or does not happen at all, so observers never see an intermediate or partial state. This all-or-nothing guarantee underpins databases, concurrency control, and reliable systems design, making "atomically" a keyword in programming documentation. The word derives from "atomic," which traces back through Latin to the Greek "atomos," meaning uncut or indivisible — fittingly, both senses preserve that core idea of indivisibility. Though uncommon in casual speech, it appears frequently in textbooks, research papers, and software engineering literature.
At the level of atoms, or with respect to atomic structure or behaviour.
"Scientists studied how the crystal grows atomically layer by layer."
Common in physics, chemistry, and materials-science writing, often in phrases such as 'atomically thin' or 'atomically precise'.
(Computing) As a single indivisible operation that either completes entirely or has no effect, leaving no intermediate state visible.
"The transaction commits atomically, ensuring the account balances remain consistent."
Standard terminology in database systems, multithreaded programming, and concurrency documentation; carries a precise technical meaning rather than a figurative one.
The same word physicists use to describe matter's smallest building blocks is the one programmers trust to guarantee that a bank transfer never half-happens.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of atomically
The word "atomically" is formed from "atomic" plus the adverbial suffix "-ly." "Atomic" entered English in the early 17th century from New Latin "atomicus," ultimately derived from Greek "atomos," meaning "uncut" or "indivisible," from "a-" (not) and "temnein" (to cut). The Greek root gave rise to related English words such as "atomism," "atomize," and "anatomy" (which shares the cutting root). The computing sense of "atomically" developed in the 20th century alongside database theory and concurrent programming, extending the ancient idea of indivisibility to operations rather than matter.
Related word forms
How atomically is actually used
The word spans two very different registers: scientific writing about matter and energy, and technical computing documentation where it carries a precise formal meaning (all-or-nothing operations). In everyday conversation it is rare; readers encounter it mostly in textbooks, technical manuals, and journalism about physics.
Easily confused with atomically
"Anatomically" relates to bodily structure, whereas "atomically" relates to atoms or indivisible operations.