That’s weird vs Unusual

When to use each in English, with meaning, register, and examples.

That’s weird

InformalTop 2,000 (common)

Unusual

Top 2,000 (common)A2adjective
Most formal: Unusual
 That’s weirdUnusual
Pronunciation🇬🇧 //ðæts wɪəd//🇺🇸 //ðæts wɪrd//🇬🇧 /["/ʌnˈjuːʒuəl//ʌnˈjuːʒəl/"]/🇺🇸 /["/ʌnˈjuːʒuəl//ʌnˈjuːʒəl/"]/
MeaningThat is strange or unusual.Not common or not what you expect.
ExampleThe lights flickered, and I thought, 'That’s weird.'She wore an unusual hat that caught everyone's attention.
RegisterInformalNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR level-A2
Part of speechadjective
CollocationsThat's weird timing, That's weird behavior, That's weird to say, That's weird, isn't it?, That’s weird for sureappear, be, look, extremely, fairly, very, for, in, appear, be, look, extremely, fairly, very, for, in
Antonyms-usual, common, ordinary
Common mistakesUsing in overly formal contexts., Confusing with 'That's strange' - similar but 'weird' has a stronger connotation., Not using the contraction (That's) - sounds more natural to shorten.Confused with 'unusual' vs 'usual'., Misuse in negative sentences, like saying 'not unusual' when you mean something is common., Using 'unusual' when 'unique' would be more appropriate.
Usage notesUse when something feels odd or unexpected; appropriate in casual contexts but can seem unprofessional in formal settings.Use 'unusual' to describe something that is different from what is typical. It's suitable for both spoken and written contexts, but may sound less natural in very informal conversations.

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That’s weird

Frequently asked questions: That’s weird vs Unusual

What's the difference between That’s weird and Unusual?

That’s weird: That is strange or unusual. Unusual: Not common or not what you expect.

Which is more formal: That’s weird and Unusual?

Unusual is the most formal of these.

Can you show an example of each?

That’s weird: The lights flickered, and I thought, 'That’s weird.' Unusual: She wore an unusual hat that caught everyone's attention.

Can I use That’s weird and Unusual interchangeably?

Not always. That’s weird and Unusual are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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