The meaning of FATHOM is a unit of length equal to six feet (1.83 meters) used especially for measuring the depth of water —sometimes used in the singular when qualified by a number. How to …

FATHOM definition: 1. a unit for measuring the depth of water, equal to 1.8 metres or 6 feet 2. to discover the…. Learn more.

A fathom is a unit of length in the imperial and U.S. customary systems equal to 6 feet (1.8288 m), used especially for measuring the depth of water. [1] The fathom is neither an international standard (SI) …

5 meanings: 1. a unit of length equal to six feet (1.829 metres), used to measure depths of water 2. mining a unit of volume.... Click for more definitions.

Define fathom. fathom synonyms, fathom pronunciation, fathom translation, English dictionary definition of fathom. n. Abbr. fth. or fm. A unit of length equal to 6 feet , used principally in the measurement …

Definition of fathom noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Dec 14, 2025 · fathom (third-person singular simple present fathoms, present participle fathoming, simple past and past participle fathomed) (transitive) (also figurative) To measure the depth of …

To fathom something is to understand it thoroughly. It's usually used in the negative, as in "I can't fathom why he doesn't want to go along with us."

FATHOM definition: a unit of length equal to six feet (1.8 meters): used chiefly in nautical measurements. fath See examples of fathom used in a sentence.

n. Weights and Measures, Naval Terms a unit of length equal to six feet (1.8 meters): used chiefly in nautical measurements. Abbr.: fath v.t. Weights and Measures to measure the depth of by means of …