# Cass

/ˈkæs/ (US)

Source: https://englishreference.com/word/cass
Updated: 2026-08-15

## Senses

### 1. a person's name

noun · CEFR A2 · Informal

a short name for people named Cassandra, Cassidy, or Cassius.

For teachers: a diminutive form of various given names including Cassandra, Cassidy, Cassiopeia, or Cassius.

- Everyone at the office calls her Cass instead of Cassandra.
- Although her legal name was Cassandra, she preferred the informal Cass in all her personal correspondence.

### 2. to cancel or annul

verb · CEFR C2 · Archaic

to make something void or to reject it.

For teachers: to render moot or void; to annul or reject a formal decision or document.

- The old law was cassed by the new king many years ago.
- The high court moved to cass the previous ruling, effectively rendering the earlier injunction moot and void.

### 4. a cassette tape

noun · CEFR C2 · Archaic

a short way to write the word 'cassette'.

For teachers: a dated abbreviation for cassette, referring to magnetic tape recordings.

- He found an old cass of his favorite band in the attic.
- The archive contained several unlabeled cass tapes from the early eighties that required specialized equipment to digitize.

## Examples

- The dry branch made a loud cass.
- The sudden cass of thunder startled the horses in the field.
- The poet described the cannon's cass as a violent rupture in the morning silence, shaking the dust from the ancient stones.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.