2 definition by TheCaptn

Top Definition
The worship of all that is nuclear in nature, be it a refurbished Titan II missile silo, an artifact of 60's atomic-retro, cheesy B-grade apocalyptic movies, or simply the weapons that inspired them all.
You know that Cappy guy? He's right into Atomicism.
by TheCaptn July 17, 2003

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One who practices Atomicism on a near-religious level.
The guy in the lead-lined clerical vestments there is an Atomicist
by TheCaptn July 17, 2003

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