http://en.wikipedia.org/w/index.php?title=Door_jamb&oldid=376045823&printable=yes http://en.wikipedia.org/w/index.php?title=Door_jamb&oldi... Depending on the

http://en.wikipedia.org/w/index.php?title=Door_jamb&oldid=376045823&printable=yes http://en.wikipedia.org/w/index.php?title=Door_jamb&oldi... Depending on the context that inspired you to ask, the literal explanation may not help.