What does atheism mean?
Atheism is the position of not believing that God or gods exist. The word covers a spectrum: for some speakers it means merely the absence of theistic belief, while others use it to mean the active conviction that no deities exist. Atheism is not itself a religion or organized system; it describes a stance on one specific question rather than a comprehensive worldview. The corresponding adjective is atheistic, and a person who holds this position is an atheist. In everyday usage the word ranges from neutral to contentious: in largely secular societies such as much of Western Europe, atheism is an ordinary description of belief, whereas in strongly religious communities it can be socially fraught and even legally restricted. Distinguishing atheism from agnosticism — which concerns what can be known about God's existence rather than what one believes — is a common point of confusion. Understanding the term matters because debates over religion, science, and public life frequently turn on precisely what atheism does and does not claim.
nounThe absence of belief in the existence of God or gods; more broadly, disbelief in or denial of any deity.
- Lack of belief in the existence of God or gods (the broad, neutral sense).
- Explicit disbelief in or denial of the existence of any deity (a narrower, stronger sense).
"His quiet atheism set him apart from most of his classmates at the religious school."
"She was raised Catholic but came to atheism during her university years."
"In some countries, open atheism can carry serious social and legal consequences."
Rarely pluralized since atheism denotes a single stance, though the plural occasionally appears when contrasting distinct varieties or traditions of atheism.
"The lecture surveyed the diverse atheisms of ancient, Enlightenment, and modern thought."
The word 'atheist' was originally an insult hurled by Christians at other Christians who disagreed with them — before anyone proudly claimed it for themselves.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of atheism
Atheism derives ultimately from Greek atheos, meaning 'without gods' or 'godless', formed from the privative prefix a- ('without') combined with theos ('god'). The term entered English in the mid-sixteenth century via French athéisme and Latin atheismus. Notably, early uses were pejorative: Christians applied 'atheist' to rivals whose conception of God they deemed inadequate, including pagans and even fellow Christians accused of heresy. Related formations include theism, monotheism, pantheism, and polytheism, all built on the same Greek root theos.
Related word forms
How atheism is actually used
Register-neutral but often discussed in formal or academic contexts. Because atheism spans both 'mere lack of belief' and 'active denial,' writers sometimes specify which sense they mean; the term carries different connotations depending on cultural context, being unremarkable in much of Western Europe and more charged elsewhere. It refers to a stance rather than an organized doctrine, so it does not imply membership in any group.
Easily confused with atheism
Agnosticism concerns knowledge — holding that whether God exists is unknown or unknowable — whereas atheism is a position on belief, namely lacking belief in a god.
Anti-theism actively opposes religion and belief in gods, while atheism simply denotes the absence of belief in them.