Synonyms of seriously in English:

seriously


See definition of seriously

adverb

1‘Faye nodded seriously, biting her lower lip’

SYNONYMS
solemnly, earnestly, gravely, soberly, sombrely, without smiling, with a poker face, sternly, grimly, dourly, humourlessly
thoughtfully, pensively, meditatively, ruminatively, contemplatively
ANTONYMS

cheerfully, jovially

2‘one woman died and another was seriously injured’

SYNONYMS
severely, gravely, badly, critically, acutely, sorely, grievously, desperately, alarmingly, dangerously, perilously
ANTONYMS

slightly

3‘do you seriously expect me to believe that?’

SYNONYMS
really, actually, honestly

4‘seriously, I'm very pleased that you're staying’

SYNONYMS
joking apart, joking aside, to be serious, honestly, without joking, no joking, truthfully, truly, I mean it
informal Scout's honour
British informal straight up
dated honest Injun

5‘‘I've handed in my notice.’ ‘Seriously?’’

SYNONYMS
really?, is that so? is that a fact? you're joking! well I never, well I never did, go on, you don't say
informal you're kidding! well blow me down with a feather, you're kidding! well knock me down with a feather
British informal well I'll be blowed
North American informal well what do you know about that?
archaic go to

6‘he was seriously rich’

SYNONYMS
extremely, very, really, dreadfully, terribly, awfully, fearfully, incredibly, amazingly, exceptionally, exceedingly, immensely, uncommonly, remarkably, extraordinarily
Scottish unco
très
informal terrifically, tremendously, right, ultra, mega, mucho, stinking, majorly, oh-so, madly
British informal jolly, ever so, dead, well
North American informal real, mighty, awful, powerful, way, bitching
South African informal lekker
informal, dated devilish, frightfully
archaic exceeding