leadsman /ˈlɛdzmən/noun 1/ˈliːdz.mən/ noun 1forms 1 noun1 •A sailor who takes soundings with a lead, measuring the depth of water.In the same moment the leadsman hove the lead, and, finding it directly take the ground, he, in his fright, called out, ‘There's only three fathom.’ — 1808 leadsman /ˈliːdz.mən/ noun1 •(no longer used) lodesman (a leader or guide) formsleadsmen