[adj] terminating abruptly by having or as if having an end or point cut off; "a truncate leaf"; "truncated volcanic mountains"; "a truncated pyramid"
[v] make shorter as if by cutting off; "truncate a word"; "Erosion has truncated the ridges of the mountains"
[v] mathematics: approximate by ignoring all terms beyond a chosen one; of a series
[v] replace a corner by a plane, in geometry