board

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A long flat slab of sawed lumber; a plank.
• noun A flat piece of rigid material designed to display information, especially.
• noun A blackboard.
• noun A bulletin board.
• noun A scoreboard.
• noun A toteboard.
• noun A flat piece of material designed or equipped to be ridden as a sport, especially a snowboard, skateboard, or surfboard.
• noun A diving board.
• noun A backboard.
• noun A flat, rigid piece of material on which a game is played, such as a checkerboard or chessboard.
• noun A table at which official meetings are held; a council table.
• noun An organized body of administrators or investigators.
• noun A table, especially one set for serving food.
• noun Food or meals considered as a whole.
• noun Sports The wooden structure enclosing an area for skating, such as the ice on which hockey is played, or enclosing a playing area, as for indoor soccer.
• noun A theater stage.
• noun Basketball A rebound.
• noun An electrical-equipment panel.
• noun Computers A circuit board.
• noun The side of a ship.
• noun A leeboard.
• noun A centerboard.
• noun Obsolete A border or edge.
• intransitive verb To cover or close with boards.
• intransitive verb To furnish with meals in return for pay.
• intransitive verb To house where board is furnished.
• intransitive verb To enter or go aboard (a vehicle or ship).
• intransitive verb To allow (passengers) on board.
• intransitive verb Nautical To come alongside (a ship).
• intransitive verb Sports To force (an opposing hockey player) into the boards with a body check.
• intransitive verb Obsolete To approach.
• intransitive verb To receive meals or food and lodging as a paying customer.
• intransitive verb Sports To use a snowboard, skateboard, surfboard, or similar item.
• idiom (across the board) So as to affect or include all people, classes, or categories.
• idiom (on board) Aboard.
• idiom (on board) Ready to participate or be included; amenable.

from The Century Dictionary.

• noun In an Australian wool-shed, the floor on which the sheep are sheared; hence, the shearers there.
• To cover with boards; inclose or close up with boards; lay or spread with boards: often with up, in, or over.
• In leather manufacturing, to rub (leather) with a pommel or graining-board, in order to give it a granular appearance, and make it supple.
• To place at board: as, he boarded his son with Mrs. So-and-so.
• To furnish with food, or food and lodging, for a compensation: as, his landlady boards him at a reasonable price.
• To come up alongside of (in order to attack); fall aboard of.