How does one define "grill"?

In "Time for Bush to abandon superpower myth" (Open Forum, April 24), the author mischaracterized the actions of Sen. Dianne Feinstein, D-Calif., regarding the nominations of Secretary of State Condoleezza Rice and would-be U.N. Ambassador John Bolton. Feinstein praised Rice before the Senate Foreign Relations Committee as a guest (not a member), reserving her criticism for other members of the Bush administration. And although the senator is on record as opposing Bolton's nomination, she did not "grill" him before the committee.