more serious
-más serio
Comparative of serious

serious

ADJECTIVE
(sincere)-serio
Synonyms for serious
ardent
ferviente
earnest
sincero
genuine
genuino
honest
honesto
keen
grande
relentless
implacable
set
decidido
sincere
sincero
venerable
venerable
Antonyms for serious
flippant
frívolo
frivolous
frívolo
insincere
insincero
mischievous
travieso
lighthearted
alegre
ludicrous
absurdo
stupid
estúpido
ADJECTIVE
(severe)-grave
Synonyms for serious
life-threatening
mortal
severe
duro
severe
grave
very bad
muy fuerte
dangerous
peligroso
dire
nefasto
extreme
extremo
grievous
grave
morbid
mórbido
substantial
sustancial
Antonyms for serious
minor
menor
harmless
inofensivo
healthy
sano
trivial
trivial
ADJECTIVE
(solemn)-serio
Synonyms for serious
austere
severo
matter-of-fact
pragmático
sad
triste
Antonyms for serious
carefree
despreocupado
cheerful
alegre
crazy
loco
flippant
frívolo
frivolous
frívolo
funny
gracioso
fun
divertido
happy
feliz
hilarious
divertidísimo
stupid
estúpido
ADJECTIVE
(important)-importante
Synonyms for serious
important
importante
determining
determinante
momentous
trascendental
pressing
urgente
Antonyms for serious
carefree
despreocupado
flippant
frívolo
frivolous
frívolo
petty
insignificante
insignificant
insignificante
lightweight
de poco peso
petty
mezquino
ADJECTIVE
(awesome)-buenísimo
Synonyms for serious
extraordinary
extraordinario
fun
divertido
Other Dictionaries
Explore the meaning of serious in our family of products.
Dictionary.com
Dictionary.com
What is the definition of “serious”?
Thesaurus.com
Thesaurus.com
What are synonyms of “serious”?
Vocabulary.com
Vocabulary.com
What does “serious” mean?
FrenchDictionary.com
FrenchDictionary.com
How do you say “serious” in French?
Random Word
Roll the dice and learn a new word now!
Get a Word
Want to Learn Spanish?
Spanish learning for everyone. For free.
Translation
The world’s largest Spanish dictionary
Conjugation
Conjugations for every Spanish verb
Vocabulary
Learn vocabulary faster
Grammar
Learn every rule and exception
Pronunciation
Native-speaker video pronunciations
Word of the Day
desenvolver
to unwrap
Word of the Day
to unwrap
desenvolver
SpanishDictionary.com is the world's most popular Spanish-English dictionary, translation, and learning website.
FEATURES
Translation
Conjugation
Vocabulary
Learn Spanish
Grammar
Word of the Day
ABOUT
About Us
Privacy
Terms
Site Map
Help
Contact Us
SOCIAL NETWORKS
Facebook
X
X
Instagram
APPS
Apple
iOS
Android
Android
IXL learning logo
Dictionary Media Group logo

IXL Learning's Dictionary Media Group reaches over 500,000,000 learners each year.

French-English dictionary, translator, and learning

English dictionary and learning for Spanish speakers

English dictionary and learning for French speakers

Comprehensive resource for word definitions and usage

Essential reference for synonyms and antonyms

Comprehensive K-12 personalized learning

Adaptive learning for English vocabulary

Immersive learning for 25 languages

Marketplace for millions of educator-created resources

35,000+ worksheets, games, and lesson plans

Fun educational games for kids

Fast, easy, reliable language certification

Trusted tutors for 300+ subjects

Bite-sized daily word games

Playful tools to learn multiplication

Copyright © 2025 Dictionary Media Group, Inc., a division of IXL Learning • All Rights Reserved.