From Japanese-English FreeDict Dictionary ver. 0.1:
反 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 段 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, たん /tˈäɴ/
1. (noun (common) (futsuumeishi))
variable measure of fabric (28.8 cm in width), for kimonos: at least 10 m in length, for haori: at least 7.27 m in length, for other clothes: at least 6.06 m in length
2. 300 tsubo (991.74 meters square, 0.24506 acres)
3. six ken (10.91 m)
From Japanese-English FreeDict Dictionary ver. 0.1:
[news1] [nf13] 段 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, [news1] [nf13] だん /dˈäɴ/
1. (noun (common) (futsuumeishi))
step, stair, (flight of) steps, (row of) stitches, columns (of print)
2. (noun (common) (futsuumeishi))
(counter)
grade, rank, level
3. (counter)
counter for breaks in written language (or speech, etc.)