Adjective
-
extraordinarily good or great
used especially as intensifiers
"a fantastic trip to the Orient"
"the film was fantastic!"
"a howling success"
"a marvelous collection of rare books"
"had a rattling conversation about politics"
"a tremendous achievement"
Adverb
-
(used as an intensifier) extremely well
"her voice is superbly disciplined"
"the colors changed wondrously slowly"