在参加会议，在开会
to be in a meeting
Ms O'Neill isn't available at the moment. She's in conference. 奥尼尔女士现在不在，她正在开会。
She rushed into the room, only to interrupt a number of executives deep in conference.
The Attorney General was in conference and unable to return calls from journalists.
The legislative teams were in conference with the White House extensively prior to the judicial nominations.
The senator said that until they were in conference, the bill could not move foward.
See also: conference (MEETING)