The world, realm, or sphere of baseball; the community, culture, and institutions associated with the sport.
From 'baseball' plus '-dom' (suffix meaning 'domain, realm, or condition'). The '-dom' suffix appears in words like 'kingdom,' 'wisdom,' and 'boredom,' indicating a sphere of activity or state.
The '-dom' suffix is delightfully flexible—it can mean a place (kingdom), a group of people (fandom), or just the general 'world of' something; 'baseballdom' means all things related to baseball culture.
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