Meaning

noun joint consisting of a line formed by joining two pieces

noun a slight depression in the smoothness of a surface

noun a stratum of ore or coal thick enough to be mined with profit

originFrom Middle English seem, seme, from Old English sēam (“seam”), from Proto-West Germanic *saum, from Proto-Germanic *saumaz (“that which is sewn”). Cognate with Dutch zoom (“hem, edge”), German Saum (“hem, edge”), Danish and Norwegian Bokmål søm (“seam”), Norwegian Nynorsk saum (“seam”), Swedish söm (“seam”).

Etymology from Wiktionary, CC BY-SA 3.0