WordþriðjiMeaningthirdPart of speechnumeralPronunciationCourseIcelandicLessonOrdinal numbers 1st to 10th (fyrsti, annar...)Usages of þriðjiÞriðja hæðin er lokuð.The third floor is closed.Hann var þriðji strákurinn í dag.He was the third boy today.