1. an early form of polyphonic music consisting of a melody with one or more accompanying voice parts
Usage: music history
2. an organ or instrument, especially a musical instrument
Usage: archaic

Examples

• Medieval composers developed organum as one of the first forms of harmony.
• The cathedral choir performed a piece of organum from the 12th century.
• Organum represented a significant advancement in Western musical composition.
• Students of music history study organum to understand early polyphony.
• The ancient organum was considered a sacred instrument in the monastery.
• Scholars debate the exact origins of organum in medieval Europe.