Nate Silver defines it:
...bipartisanship, as Obama intended the term, should not necessarily be confused for "compromise". Rather, it implied behaving in good-faith -- hearing out opinions from different sides of the aisle and identifying the best ideas regardless of their partisan origin. Bipartisanship, to Obama, was a process rather than an outcome. He could plausibly have been acting in a bipartisan manner, even if he hadn't gotten many Republicans to go along with his agenda.