Glossary: phoneme

Explanation

A phoneme is the smallest unit of sound that signals a distinct, contrasting meaning. For example:

  • /t/ contrasts with /k/ to signal the difference between tap and cap
  • /t/ contrasts with /l/ to signal the difference between bought and ball.

It is this contrast in meaning that tells us there are two distinct phonemes at work.

There are around 44 phonemes in English; the exact number depends on regional accents. A single phoneme may be represented in writing by one, two, three or four letters constituting a single grapheme.

  • The word cat has three letters and three phonemes: /kæt/
  • The word catch has five letters and three phonemes: /ka?/
  • The word caught has six letters and three phonemes: /k?:t/
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