the realm, kingdom, or domain of elves; the world or state of being an elf.
From elf plus -dom (meaning 'kingdom' or 'realm'). The -dom suffix comes from Old English and denotes a domain or state, as in 'kingdom' or 'freedom'.
Elfdom became a popular literary concept through fantasy—works like Tolkien's Middle-earth gave elfdom a complete geography, culture, and history that influenced all modern fantasy writing.
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