1. The mass which is read before the high altar on Sundays, feast days, and great occasions.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• gigh mass,
• bigh mass,
• nigh mass,
• jigh mass,
• uigh mass,
• yigh mass,
• hugh mass,
• hjgh mass,
• hkgh mass,
• hogh mass,
• h9gh mass,
• h8gh mass,
• hifh mass,
• hivh mass,
• hibh mass,
• hihh mass,
• hiyh mass,
• hith mass,
• higg mass,
• higb mass

The adjective form of "high mass" is "high-mass".

The plural form of "high mass" is "high masses".

The singular form of the word "high mass" is "high mass".