Definitions
1.nounGrasp, envelopment, control.
2.noun(now usually nautical) An English unit of length for water depth notionally based upon the width of grown man's outstretched arms but standardized as 6 feet (about 1.8 m).
3.nounVarious similar units in other systems.
4.nounDepth of insight, mental reach or scope.
5.verbTo encircle with outstretched arms, especially to take a measurement; to embrace.
6.verbTo measure the depth of, take a sounding of.
7.verbTo get to the bottom of; to manage to comprehend; understand (a problem etc.)."I can't for the life of me fathom what this means."