1. An ancient alphabet used in Ireland and Britain, consisting of 20 letters represented by straight lines and notches on stone or wood.
Usage: Also spelled 'ogham'; Historical and archaeological term; Often capitalized when referring to the writing system

Examples

• Scholars study ogam inscriptions found on ancient Irish stones.
• The ogam alphabet was used primarily for marking names and dedications.
• Each letter in ogam was named after a tree or plant.
• Archaeologists discovered ogam carvings on the standing stones.