the act of passengers and crew getting aboard a ship or aircraft
"After security cleared everyone, boarding began promptly at 8:00 AM as passengers found their seats on the plane."
a structure of boards
"The children gathered on the wooden boarding before jumping into the lake."
the act of people getting aboard a ship aircraft, train, bus etc.; embarkation
"The line stretched down the dock as passengers waited their turn for boarding the cruise ship."
In plain English: Boarding is when you stay at someone else's house for food and shelter while they take care of your daily needs.
"The boarding process for our flight was delayed due to security checks."
Usage: Use "boarding" to describe the process or time when passengers get on a vehicle like an airplane or train; often used in phrases like "boarding pass" or "boarding time."
present participle of board
"The boarding of passengers onto the flight took longer than expected due to a delay at the gate."
In plain English: To board means to get on top of something, like climbing onto a roof or jumping into a vehicle.
"The passengers are boarding the plane for their flight to London."
The word boarding comes from combining the verb board with the suffix -ing. It originally referred to the act of getting on a ship or vehicle by climbing over its side, which is how it entered English usage today.