from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective In motion or operation.
  • adjective Already commenced or initiated; in progress.
  • adjective Nautical Neither anchored nor moored to a fixed object.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun a road, track, path, or street for going under another way or obstacle
  • noun an underground passage, tunnel
  • noun a voyage, especially underwater
  • noun computer science subroutine
  • adverb in motion, in progress; being done or carried out

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective currently in progress


from Wiktionary, Creative Commons Attribution/Share-Alike License

From under- +‎ way


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