fathom

noun

1. a linear unit of measurement (equal to 6 feet) for water depth

Definition categories: quantity

2. (mining) a unit of volume (equal to 6 cubic feet) used in measuring bodies of ore

Definition categories: quantity

verb

1. come to understand

Similar word(s): bottom, penetrate

Definition categories: cognition, understand

2. measure the depth of (a body of water) with a sounding line

Similar word(s): sound

Definition categories: change, measure, quantify