board

1 board /ˈboɚd/ noun
plural boards
1 board
/ˈboɚd/
noun
plural boards
Britannica Dictionary definition of BOARD
1 
[count] : a long, thin, flat piece of wood
2 
[count]
a  : a flat piece of material (such as wood or cardboard) that is used for a special purpose
b  : bulletin board 1
— see also message board
c  : a large, smooth surface for writing on — see also blackboard, whiteboard
3 
[count]
a  : a group of people who manage or direct a company or organization
b  : a group of people who have been chosen to learn information about something, to give advice, etc.
— see also boardroom, school board
4 
[noncount] : daily meals that you pay for when you are paying to stay at a hotel, school, etc.
— see also room and board
5 
[count] : circuit board
6 
boards [plural] US : special tests that you take when you want to be accepted as a student at a college or medical school
7 
the boards US : the low wooden wall that surrounds the playing surface in ice hockey

across the board

: in a way that includes or affects everyone or everything
— see also across-the-board

go by the board

or US go by the boards
: to no longer be used or considered : to be discarded, rejected, or abandoned

on board

1 
: in or on a train, boat, etc. : aboard
2 
: included among the group of people who support a particular goal, project, etc.

sweep the board

— see 1sweep

take (something) on board

British
: to decide to accept or deal with (something, such as a suggestion or idea)

tread the boards

— see 1tread
2 board /ˈboɚd/ verb
boards; boarded; boarding
2 board
/ˈboɚd/
verb
boards; boarded; boarding
Britannica Dictionary definition of BOARD
1 
a  : to get into or onto (an airplane, a bus, a train, etc.)
[+ object]
[no object]
b  : to put or allow (someone) into or onto an airplane, a bus, a train, etc.
[+ object]
[no object]
2 
[+ object] : to cover or close (something) with pieces of wood — usually + up
3 
a  [+ object] : to provide (someone) with daily meals and a place to live in exchange for money
b  [no object] : to pay for daily meals and a place to live — see also boardinghouse, boarding school