Markedly means to a degree that is easy to notice. Markedly better.
It is used in reports and reviews where a plainer word would seem too casual. Markedly claims the difference would be obvious to anybody rather than only to the writer.
1adverbmarkedlyTo a degree that is easy to notice.
“The second half was markedly better than the first.”
markedly is a manner.
Also accepted in games: noticeably
From marked + -ly.
Etymology from Wiktionary, CC BY-SA