decidedly

English [edit]

From decided +‎ -ly.

decidedly (comparative more decidedly, superlative most decidedly)

In a manner which leaves little question; definitely, clearly.

In a decidedly petulant manner she sat with crossed arms and a frown.
- 2012 April 29, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “Treehouse of Horror III” (season 4, episode 5; originally aired 10/29/1992)”:
  
  In time The Simpsons would, indeed, resort to spoofing such decidedly non-spooktacular fare like E.T and Mr. And Mrs. Smith (both in “Treehouse Of Horror XVIII”) but in 1992 the field was wide-open and the show could cherry-pick the most iconic and beloved fright fare of all time.
In a decided or final manner; resolutely.
- 1914, Saki, ‘The Lull’, Beasts and Superbeasts:
  
  ‘We can't,’ said Vera decidedly, ‘we haven't any boats and we're cut off by a raging torrent from any human habitation.’

in a decided manner

in a manner which leaves no question