DuckCorp Dico

Found 2 definitions

1.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
   棟 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, とう /tˈo̞ɯᵝ/
   1. (noun (common) (futsuumeishi))
   large building, building with a long roof
   2. (suffix)
    (counter)
   counter for buildings, apartments, etc.
   
                   
                 

2.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
    [ichi1]  [news1]  [nf08]  棟 /(en)tʃˈaɪniːz(ja)lˈe̞tə/,  [ichi1]  [news1]  [nf08] むね /mˈɯᵝne̞/
   1. (noun (common) (futsuumeishi))
    (often むな as a prefix)
   ridge (of roof)
   2. 刀背back of a sword
   3. (suffix)
    (counter)
   counter for buildings, apartments, etc.