boardroom

As a noun boardroom

is the room where a group of people (especially the board of a company or organization) conducts its meetings.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between boardroom and banquet

is that boardroom is the room where a group of people (especially the board of a company or organization) conducts its meetings while banquet is a large celebratory meal; a feast.

As a verb banquet is

to participate in a banquet; to feast.

As nouns the difference between ballroom and boardroom

is that ballroom is a large room used for dancing and banquets while boardroom is the room where a group of people (especially the board of a company or organization) conducts its meetings.

As nouns the difference between conference and boardroom

is that conference is the act of consulting together formally; serious conversation or discussion; interchange of views while boardroom is the room where a group of people (especially the board of a company or organization) conducts its meetings.

As a verb conference

is to assess (a student) by one-on-one conversation, rather than an examination.