on board - on or in an aircraft, train, or ship, take on board - to understand or accept an idea or a piece of information, back to the drawing board - back to the beginning of a process to start it again, because it is not working, go overboard - to do something too much, or to be too excited or eager about something, above board - honest and not trying to deceive anyone, across the board - affecting everyone or everything within an organization, system, or society,

Adv 2 - expressions with 'board'

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