As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):
- (gen., dat., acc. þriðja, pl. þriðju), ord. numb. the third; í þriðja sinn, for the third time.
Possible runic inscription in Younger Futhark:ᚦᚱᛁᚦᛁ
Also available in related dictionaries:
This headword also appears in dictionaries of other languages closely related to Old Icelandic.