1. [ verb ] come to understand
Synonyms: penetrate bottom
Related terms: understand penetration
2. [ noun ] a linear unit of measurement (equal to 6 feet) for water depth
Synonyms: fthm
Related terms: linear_unit yard
3. [ verb ] measure depths with a sounding line, as of a body of water
Synonyms: sound
Related terms: quantify sound sounding
4. [ noun ] (mining) a unit of volume (equal to 6 cubic feet) used in measuring bodies of ore
Synonyms: fthm
Related terms: volume_unit mining
Similar spelling:   fatten