Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “fathom”

See all translations

fathom

noun [C]  /ˈfæð·əm/ us  

fathom noun [C] (MEASUREMENT)

a unit of measurement of the depth of water equal to 6 feet or 1.8 meters

fathom

verb [T]  /ˈfæð·əm/ us  

fathom verb [T] (UNDERSTAND)

to discover the meaning of something: I just couldn’t fathom what he was talking about.
(Definition of fathom from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of fathom?
Add Cambridge dictionaries to your browser to your website

Definitions of “fathom” in other dictionaries

Word of the Day

justice

fairness in the way people are dealt with

Word of the Day

A certain je ne sais quoi: French words and phrases used in English

by Liz Walter,
January 21, 2015
It is an odd irony that the more sophisticated your use of English is, the more likely you are to use French words and phrases. Or, to be more accurate, ones you know to be French – words such as ballet, au pair, abattoir, fiancé, café, and restaurant are so entrenched in

Read More 

flower beard noun

January 19, 2015
a beard adorned with flowers And some of said beard-rockers are even turning it up a notch, painting trend on top of trend with what’s come to be known as ‘the flower beard.’

Read More