As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):
- m. pl., um aldrdaga, for ever and ever (= um aldr).
Possible runic inscription in Younger Futhark:ᛅᛚᛏᚱᛏᛅᚴᛅᚱ
Also available in related dictionaries:
This headword also appears in dictionaries of other languages closely related to Old Icelandic.