Definition of "boarding"

boarding

verb
1. present participle and gerund of board
noun
countable and uncountable, plural boardings
1. The act of people getting aboard a ship aircraft, train, bus, etc.; embarkation.
  Quotations
  Load profiles are a standard analysis tool showing passenger activity (boardings, alightings) and passenger load at each stop along a route in a single direction.
  2000, Peter Gregory Furth, Data Analysis for Bus Planning and Monitoring, page 24
2. The act of a sailor or boarding party attacking an enemy ship by boarding it.
3. A structure made of boards.
4. (uncountable) The riding of a skateboard.
5. (ice hockey) A penalty called for pushing into the boards.