Synonyms of solemn in English:

solemn


See US English definition of solemn

See UK English definition of solemn

See Spanish definition of solemne

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