Definition of "whiteboard"

whiteboard

/ˈwaɪtbɔːd/

noun
plural whiteboards
1. A writing board finished with a hard white material, which can be written upon using special non-permanent markers and subsequently wiped clean.
  Quotations
  Mark Miller gave himself up to Xanadu's pull and rejoined the project full time. The new Xanadu site on Palo Alto's California Avenue was remodeled to resemble the environment at Xerox PARC. The programmers' offices opened onto a large common space, and the walls were covered with white board, which quickly became a tangle of multicolored lines, words, circles, and squiggles.
  1995, Gary Wolf, "The Curse of Xanadu", Wired Magazine
  Discussion turns to the station whiteboard, which even has its own Twitter page. It's been in place for a number of years and is located right in the middle of the concourse. It's used to provide service information, upcoming alterations and event advice. There is also a 'Chuckle of the Day'.
  2020 December 30, Richard Clinnick, “Greater Anglia strikes again...”, in Rail, page 43
2. (by extension, computing) A collaborative tool allowing several users to write and draw on the same shared display.
verb
third-person singular simple present whiteboards, present participle whiteboarding, simple past and past participle whiteboarded
1. To use a whiteboard, to write on a writeboard