serious
B1Pronunciation
UK
- /sˈiərɪəs/
US
- /ˈsɪriəs/
Description
- Important
- Grave
- Thoughtful
When something is serious, it needs your full attention because it is important, dangerous, or not meant as a joke. A broken toy is usually not serious, but a broken bone is. You might have a serious talk with a friend about their problems, or a doctor might say that an illness is serious. The idea is that the situation matters and can have real results.
The word can also describe a person who is not playful. A serious student works hard, and a serious actor gives full attention to the role. Sometimes, being serious simply means not joking around. "Are you serious?" is often used to check whether someone really means what they say.
The word "serious" carries a lot of weight—literally and figuratively. At its core, it describes something that deserves careful consideration because it's important, significant, or potentially harmful. A serious illness requires immediate medical attention; a serious financial crisis demands responsible action. It's the opposite of trivial or frivolous.
"Serious" can describe a situation ("The flooding is a serious problem"), an emotion ("She was deeply serious about her commitment to environmental activism"), or a person's demeanor ("He has a very serious personality"). A serious person tends to be thoughtful, responsible, and not given to lightheartedness.
You'll often encounter "serious" in phrases like "in all seriousness" (meaning genuinely) or the question "Are you serious?" which is used to express disbelief or seek confirmation. It can also describe a work of art that tackles weighty themes—a serious novel, for example, might explore complex moral dilemmas.
Interestingly, the root of "serious" comes from the Latin word serius, meaning "grave" or "weighty." This origin fits the word well: something serious is not to be taken lightly; it carries weight and demands attention. So whether you're facing a difficult challenge, making an important decision, or describing someone with a thoughtful nature, "serious" is a strong word that signals importance and consequence.
Examples
- 1
Urgent problem
This is a serious problem, and we need to fix it today.
- 2
Medical assessment
The doctor said the injury was not serious, but I should rest for a few days.
- 3
Facial expression
Her face became serious when she heard the news.
- 4
Personal goal
I'm serious about saving money this year.
Pattern
serious about + goal
really determined about it
- 5
Relationship
They've been dating for a year, and now the relationship feels serious.
Phrase
a serious relationship
one with strong commitment
- 6
Not joking
I thought he was joking, but he was completely serious.
- 7
Surprise
Are you serious? You quit your job this morning?
Phrase
Are you serious?
used to show surprise or disbelief
- 8
Meeting tone
This is a serious meeting, so let's stay focused.
Forms and spellings
1 form open this card.
Main spelling
- seriousadjective