Noun
A letter, or character, belonging to the written language of the ancient Norsemen, or Scandinavians; in a wider sense, applied to the letters of the ancient nations of Northern Europe in general.
Old Norse poetry expressed in runes.
Source: Webster's dictionaryJem touched the parabatai rune on his shoulder, through the thin material of his nightshirt. "I am not alone," he said. "Wherever we are, we are as one. Cassandra Clare
We're Nephilim. Every one of our life's passages has some mystical component - our births, our deaths, our, marriages, everything has a ceremony and a rune. There is one as well if you wish to become someone's parabatai. It's no small commitment. Cassandra Clare
and a rather controversial one for birth control that had nevertheless quickly become the most often used rune in the lexicon. Cassandra Clare
Runes, runes, runes... Runes. An inverted Algiz rune. The caption next to it said "Chernobog.” The Black God. Right. Of course, it wouldn't be Chernobog, God of Morning Dew on the Rose Petals, but a woman could always hope. Ilona Andrews
each rune had its own magical significance Source: Internet
A few sounds are instead written with the same rune regardless of the letter (e.g. the sound main is always written with the rune "O" either if in English it is written "o" as in "north", "a" as in "fall", or "oo" as in "door"). Source: Internet