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Synonyms of solemn in English:

solemn


See definition of solemn

adjective

1‘a solemn occasion’

SYNONYMS
dignified, ceremonious, ceremonial, stately, courtly, majestic, imposing, impressive, awe-inspiring, portentous, splendid, magnificent, grand, important, august, formal
ANTONYMS

frivolous

2‘Tim looked very solemn’

SYNONYMS
serious, earnest, grave, sober, sombre, unsmiling, poker-faced, stern, grim, dour, humourless, glum, gloomy, moody, stony-faced
thoughtful, preoccupied, deep in thought, pensive, meditative, ruminative, contemplative, introspective
staid, sedate, studious, bookish, owlish
ANTONYMS

light-hearted

3‘a solemn promise’

SYNONYMS
sincere, earnest, honest, genuine, firm, committed, unconditional, heartfelt, wholehearted, sworn, formal
ANTONYMS

insincere