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Adverb: possibly  pó-su-blee
  1. By chance
    "we may possibly run into them at the concert";
    - perchance, perhaps, maybe, mayhap [archaic], peradventure [archaic]
  2. To a degree possible of achievement or by possible means
    "they can't possibly get here in time for the funeral?"

Antonym: impossibly

Encyclopedia: Possibly