Questions about example sentences with, and the definition and usage of "Serious"

A: It means that something which is really important for me.

A: Quote of the Joker in "The Dark Knight"
"Why so serious?" means "Why are you being so serious?" that is, humorless.

A: oh... many thanks 🙂 can you give me an example please?

A: They are asking why someone is so serious

A: they both mean you are being serious about something. serious is to be firm in your thinking towards something.
"i am being serious about going to italy"
"i seriously believe aliens exist"

A: why so serious? - joker

A: She is so serious about this project!

Why are you so serious tonight?

A: •Seriously? you have to be joking
•On a serious note, I am serious.
•I dont think you understand the seriousness of your situation
•Its nothing serious, really
•Youre making a serious mistake, and one day thats gonna be a serious problem

A: That lump on your breast looks pretty serious. You should see a doctor.

Him and I are getting pretty serious! I might sleep with him tonight.

A: "I'm serious" means, well, you're serious.

As for "I'm not playing", it could mean:
1. You're serious and not playing around
2. You're literally not playing

Example (2):
A: "Let's play catch, I'll pitch."
B: "Nah, I'm not playing."

A:

AM is simply another form of the verb TO BE -

I am serious
– so therefore, I am being serious is merely an intensified version of exactly the same thing.

In practice, however, there really isn't any difference between these two, because people generally only say them when they are stressed or emotional, so there is not much room for subtlety.

A: “for serious?” or sometimes “seriously” is slang meaning “are you being serious?” or “is that true?” or sometimes
It is used when you are surprised/shocked about something. You can also hear “for real?” or “no way, seriously?”

A: I went skydiving over the summer
B: For serious?
A: Seriously! I’ll show you pictures!

A: "Severe" sounds more clinical and "serious" sounds more casual. "Acute" is the opposite of "chronic." It describes a problem that arises at one specific time instead of coming and going throughout life.

A: Serious is used to describe someone who is mature, doesn’t goof around, is very professional, or means what they say. Stern can be used to describe someone who has a lot of rules, is strict, or wants work done properly. Someone who is serious may not care how you act but someone who is stern will often correct you and make sure you are on task/ doing what you are supposed to be doing.

A: Why are you so serious?

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A: last one is most natural to me

A: hope this helps! :)

A: This phrase is used as texting slang typically so if you are going for formal or correct english you should say, “Why are you being so serious?”

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A: Big list here!

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A: even though "ya" is a slang, with this sentence people usually just say "why are you so serious? "