- Fine powder; flour.
- The powder or finest part of ground malt.
- (mining) Smitham.
- (Scotland) Zest, energy; pluck; sagacity; quickness of apprehension; gumption; spirit; mettle.
- (UK dialectal, Northern England) Ore small enough to pass through the wire bottom of a sieve.
- (UK dialectal, Northern England) A layer of clay or shale between two beds of coal.
From Middle English smedma, from Old English smedma, smedema (“fine flour, pollen meal, meal”).