Yes. Such as - 'Tim talked on and on ad infinitum' - would be a valid example of using it in a sentence. ~fiendishfish
Stars in the universe go on and on ad infinitum. It simply means 'forever' or 'to infinity'.
The current year is 2010 AD.
His ad lib comments showed poor judgment. His ad libs got him in trouble with the politicians.
we have an ad hoc network.