truncate -- (approximate by ignoring all terms beyond a chosen one; "truncate a series")
truncate, cut short -- (make shorter as if by cutting off; "truncate a word"; "Erosion has truncated the ridges of the mountains")
Overview of adj truncate
The adj truncate has 1 sense
truncate, truncated -- (terminating abruptly by having or as if having an end or point cut off; "a truncate leaf"; "truncated volcanic mountains"; "a truncated pyramid")