A Scottish dialect word for a chimney.
From Scots and Scottish English, possibly related to or influenced by 'loom', which can mean chimney in some dialects. The word has distinctly Scottish/Northern English regional roots.
Scottish English has survived for centuries partly through preserved words like 'lum' that don't exist in standard English—they're keys to understanding how regional languages develop differently. Scotland's linguistic independence is why Robert Burns' poetry is still written in Scots, preserving a parallel English language tradition.
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