Definitions
1.AdverbIn a momentary manner; for a moment or instant.
2.AdverbIn a moment or very soon; any minute now, any time now."The system will restart momentarily."
3.AdverbProgressively; moment by moment.
4.Adverb1 2 3 “Just a Moment”, by William Safire, New York Times, May 11, 1997
5.Adverb1 2 3 4 I Stand Corrected: More on Language, by William Safire pp. 137–138
6.Adverb↑ On language, by William Safire, 1980, p. 9