characterized by or constituting a form of government in which power is held by one central authority; "a unitary as opposed to a federal form of government"
of or pertaining to or involving the use of units; "a unitary method was applied"; "established a unitary distance on which to base subsequent calculations"
relating to or characterized by or aiming toward unity; "the unitary principles of nationalism"; "a unitary movement in politics"
an estimation that is too low; an estimate that is less than the true or actual value
make too low an estimate of; "he underestimated the work that went into the renovation"; "Don't underestimate the danger of such a raft trip on this river"