As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):
forn Old Icelandic word can mean:
- 1) old (f. vinátta, f. mjóðr);
- 2) ancient; fornir menn, the men of old; f. siðr, the old (heathen) custom, religion; f. átrúnaðr, the old creed, heathenism; f. í skapi, inclined to old, or heathen, ways; hann var f. mjök, he was a great wizard; at fornu, til, forna, formerly, in times fast.
Possible runic inscription in Younger Futhark:ᚠᚢᚱᚾ
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This headword also appears in dictionaries of other languages closely related to Old Icelandic.