Dictionary Home »
Dictionary Definitions » fathom
fathom
noun
a unit of length used to measure the depth of water or the length of a nautical rope or cable, equal to 6 ft (1.8288 m)
transitive verb
- to measure the depth of; sound
- to get to the bottom of; understand thoroughly
Related Forms:
- fathomable adjective
See fathom in American Heritage Dictionary 4
Learn more about fathom