mass

Pronunciation

• (UK) IPA ^(key): /mæs/ or /mɑːs/, SAMPA: /m{s/
• (US) IPA ^(key): /mæs/, SAMPA: /m{s/

• Audio (US)

  (file)

Noun

Singular mass

Plural masses

1. A measure of how much material is in something.
   • Synonyms: ton and bunch

   The Earth has much more mass than the moon.

   The spacesuit weighed 75 pounds on Earth but here in outer space it weighed nothing, although its mass was exactly the same.

2. Much material.

   A mass of dirty branches stopped the river.

3. A Christian ceremony in memory of the Last Supper.
   • Synonym: Eucharist

   He goes to mass every Sunday.

4. A crowd of people.

   A mass of protesters gathered at city hall.