There are many, different uses for the word "board."
When "board" is used as a verb, it means to enter an airplane or a boat.
simple
past
past participle
board
boarded
boarded
We boarded the plane after our numbers were called.
In order to board a plane from the terminal, you have to walk through a loading bridge or a jet bridge.
To board a large ship, passengers walk up a gangplank or a bridge that connects the dock to the ship.
Boarding an airplane takes time because passengers need to find their seats and stow their luggage. (stow = put away)
To board also means to provide housing and food for someone.
In addition to tuition costs for college, students living on campus also have to spend money on room and board. (room and board = a place to live plus food)
Samantha has to board her dogs whenever she goes on vacation because there’s no one to take care of them for her.
A very large house down the street accepts boarders. (boarder = a person who is provided with a place to sleep and, perhaps, food)
Jonathan is temporarily boarding with some people he met online.
When the word "board" is used as a noun, it represents a flat surface for writing, working, or protecting something.
You cut vegetables or meat on a cutting board.
You iron clothes on an ironing board.
Windows and doors of an abandoned house are often covered with boards.
Before a hurricane arrives, coastal residents board up their windows to protect their homes from damage.
A skateboard is a rectangular board with wheels on it.
A surfboard is a long rectangular object that surfers use for riding strong waves on the water.
Cardboard is a strong paper product that is used for boxes, packaging, and making signs.
You can make a desk by putting a large plywood board on top of two filing cabinets.
She’s about to jump off of a diving board.
A board can also be a group of people who provide advice and leadership for a large corporation or a large organization.
David sits on the board of directors for a Fortune 500 company.
The school board needs to find a new superintendent for the school district.
Members of the board meet in a large meeting room with a long table.