Mass (noun)

1. The amount of matter in an object.
2. A large quantity of something.
3. A religious ceremony at which the Eucharist is celebrated.

Origin:

Middle english: from old french masse, from latin massa "lump, dough".

Examples:

1. The mass of the planet is approximately 5.97 x 10^24 kilograms.
2. There was a mass of people waiting in line.
3. The church was filled with the sound of choir music during the mass.
4. A mass of cloud covered the sky.
5. The mass of water in the ocean is a key factor in regulating the Earth's climate.