An Old English letter, ð or Ð, representing the dental fricatives ð and θ. It was superseded by the digraph th, but is now used as a phonetic symbol for the voiced dental fricative ð. Compare with thorn (sense 3).
- By that time, the sound of æ had merged with that of short a, the sound of thorn and eth was already spelt th in words transliterated from Greek into Latin, and wynn had been largely superseded by w.
From Danish edh, perhaps representing the sound of the letter.