momentarily /ˈməʊməntəɹəli/ adverb3 •In a momentary manner; for a moment or instant.I imagined momentarily that it was four score and seven years ago, that I had just been brought forth from my mother[…] — 2010 •(US, nonstandard) In a moment or very soon; any minute now, any time now.The system will restart momentarily. •Progressively; moment by moment.