Skip to main content
serious

serious

2.7
Likely to cause great harm or danger
  • adjective
  • /ˈsɪr.i.əs/
translation icon : grave
  • Emergency department crowding causes two serious issues that expose patients to the potential for harm.
  • a serious problem
  • a serious injury
  • a serious illness

He used my law of perceived serious harm to take her apart.

Autoplay Next

Examples

  • Consider this example demonstrating the potentially serious consequences of an inaccurate computer record.

    Academic text (2012)
  • The situation is more serious than you can imagine.

  • And it's causing really serious harm to these girls.

  • There have been claims of rare serious reactions, even deaths.

  • Damage related to falls caused by balance problems is a serious health issue for stroke patients.

    Academic text (2015)
  • But the Army's own investigation found serious problems behind the scenes.

  • Smoking and alcohol consumption, which may lead to serious health problems, are commonly observed among young people.

    Academic text (2013)
  • Now this is a serious problem, and I'm the only one that's talkin' sense.

  • As a result, he "now suffers from a serious and permanent impairment that could have been avoided."

    Academic text (2017)
  • The contamination could cause serious health issues for the community.

Synonyms

dangerous
vsserious
1.5

Likely to cause harm or injury

causes fear by stressing potential great harm rather than general risk
scary
vsserious
763 1.0

Causing fear or making you feel afraid

causes fear by stressing threat of great harm rather than ordinary scariness
severe
vsserious
520 3.5

Very strong and harmful, often causing great damage

causes fear by pointing to dangerous consequences rather than just high intensity
frightening
vsserious
287 3.0

Causing someone to feel afraid

causes fear by focusing on potential major harm rather than simple fright
grave
vsserious
  • Formal
181 4.2

Very serious and needing careful attention

causes fear by threatening great harm rather than expressing seriousness or dignity
alarming
vsserious
94 3.7

Making people feel worried because something seems dangerous

causes fear by implying especially great consequences rather than general worry
life-threatening
vsserious
66 4.3

Dangerous enough to cause death

causes fear by suggesting major harmful consequences, not only everyday risk
threatening
vsserious
65 3.6

Showing that something bad or dangerous may happen

causes worry by implying large consequences rather than merely indicating risk
grievous
vsserious
  • Formal
26 7.9

Causing great pain or sorrow

causes fear by implying threatening consequences, not only intense suffering
frightful
vsserious
7 4.2

Very bad or unpleasant in a strong way

causes fear by highlighting potential great harm rather than mere unpleasantness
menacing
vsserious
1 5.0

Giving the feeling that something dangerous may happen

causes fear by pointing to possible large harm rather than just an eerie feeling
minatory
vsserious
  • Formal
9.9

That makes people feel afraid

causes fear by implying great harmful consequences rather than a spoken warning

Antonyms

1.0

Not likely to be harmed or in danger

231 1.0

Not able to hurt people or things

Compounds

41 3.0

A problem that needs careful attention and action

A health problem that is very bad and may last a long time

A strong chance that people or property will be harmed

Breaking an important rule or law that causes big harm and heavy punishment

Music that people listen to carefully, like symphonies and operas

A calm, quiet way of behaving that shows you are thinking about important things

Being careful and thoughtful about important things

How Dangerous

serious
2.7
dangerous
1.5
risky
269 3.6
harmless
231 1.0

Surface Forms

serious positive
seriouser comparative
seriousest superlative

Etymology

Serious comes from the Latin word serius, meaning 'weighty' or 'important', giving the sense that something could cause real harm. That's why a serious injury or illness is one that is dangerous and needs quick attention.