Â©Copyright 2004 - 2015 Meaning-of-Names.com-Powered by Swigity, LLC Meaning of Niemann Last Name-Surname-Family Name Niemann.Copyright 2004 - 2015 Meaning-of-Names.com-Powered by Swigity, LLC Meaning of Niemann Last Name-Surname-Family Name Niemann.
open - of a set; containing points whose neighborhood consists of other points of the same set, or being the complement of an open set; of an interval; containing neither of its end points.
Definition of open up. transitive verb. 1 : to make available or possible The discovery opens up the possibility of new cures. 2 : to make plain or visible : disclose. 3 : to open by cutting into. intransitive verb. 1 : to become available or possible The hostess will let us know when a table opens up.