B2 [ C ] a thin, flat piece of cut wood or other hard material, often used for a particular purpose（有特定用途的）薄木板；板；牌子
A2 [ C ] a flat piece of wood or other hard material with a special pattern on it, used for playing games棋盘
A1 [ C ] a blackboard or whiteboard 黑板或白板
A2 [ C ] a noticeboard 布告板，公告栏
[ C ] a diving board （跳水用的）跳板
the wooden fence surrounding the ice surface in ice hockey（冰球场周围的）护板
old-fashioned the stage in a theatre舞台
Today's specials are written on the board.
He stuck up a notice on the board with pins.
He advertises his services on the company notice board.
When it was his turn to dive, he gulped and stepped up onto the diving board.
The man's body was as stiff as a board when it was found in the snow.
C1 [ C usually singular, + sing/pl verb ] the group of people who are responsible for controlling and organizing a company or organization董事会；理事会；委员会
The decision will have to be ratified by the executive board.
There's a board of five directors, but she is the Managing Director.
There is a predominance of people with an arts degree on the board of governors.
She persuaded the board of her worthiness to run the company.
The editorial board has an expert with a world-wide reputation in the person of Professor Jameson.
an official examination given by some medical and business organizations in the US（美国某些医疗、商业组织举行的）执业考试
B1 [ I or T ] to get onto or allow people to get onto a boat, train, or aircraft（使）上（船、火车或飞机）
The platform was crammed with people trying to board the train.
I took out a travel insurance policy before I boarded the plane.
They boarded a ship that was sailing the next day.
He was thought to have boarded the plane in New York.
Flight 474 to Buenos Aires is now boarding at gate 9.
[ I ] to pay to sleep and eat meals in someone's house寄宿
[ I ] to sleep and eat at school during the school term（在学校）住校
[ T ] UK to arrange for a pet animal to be temporarily taken care of at a place other than its home将（宠物）暂时寄养在他处