Fāth'om1, n.
n. [A-S. fādhem, fādhm, L. Ger. fadem, D. vadem, vaam, Icel. fadmír, N. H. Ger. faden; O. Sax. fadhm, embrace; O. H. Ger. fadam, fadum, M. H. Ger. vademe, vaden, N. H. Ger. faden, thread; both from Goth. fahan, O. H. Ger. fāhan, N. H. Ger. fahen, to take, seize.]
Sense 1. A measure of length, containing six feet; the space to which a man can extend his arms; — used chiefly at sea, for measuring cables, cordage, and the depth of the sea, in sounding by a line and lead.
Sense 2. The measure or extent of one's capacity; depth of intellect or contrivance; profundity. [Rare.]
Another of his fathom they have none To lead their business. Shak.