loam UK /ləʊm/US /loʊm/noun 2adjective 1verb 1forms 3 noun2 •A type of soil; an earthy mixture of sand, silt and clay, with organic matter to which its fertility is chiefly due.Alexander died, Alexander was buried, Alexander returneth to dust, the dust is earth, of earth we make loam, and of why that loam whereto he was converted might they not stop a beer-barrel? — 1599 •A mixture of sand, clay, and other materials, used in making moulds for large castings, often without a pattern. adjective1 •Made of loam; consisting of loam. verb1 •To cover, smear, or fill with loam. formsloamed · loaming · loams