Origin: Greek suffix -ist
Atheist has 6 different meanings across 2 categories:
someone who does not believe in the existence of a god
"After years of searching for spiritual answers, she finally became an atheist and stopped attending church services every Sunday."
A person who does not believe in deities.
"After reading the new philosophical text, she confidently identified herself as an atheist because she no longer believed any gods existed."
A person who believes that no deities exist (especially, one who has no other religious belief).
"After years of questioning religious dogma, she finally came to terms with her identity as an atheist and began exploring secular philosophies instead."
To make someone an atheist.
"The controversial documentary effectively turned many devout followers into atheists by exposing their faith as a fabrication."
Of or relating to atheists or atheism; atheistic.
"The museum's new atheist exhibit attracted a diverse crowd interested in exploring secular perspectives on history and culture."