Definitions

1. noun

A crom is a small stone or rock, especially one used in the construction of a cairn or other stone monument.

“The hikers left a small crom on top of the mountain as a marker for the trail.”

2. noun

A crom is a unit of weight or mass in Ireland, particularly in the context of metalwork or other crafts.

“The blacksmith used a crom to measure the weight of the iron bars.”