Insignificant vs Irrelevant

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

Insignificant

Top 5,000 (fairly common)

Irrelevant

Top 2,000 (common)C1adjective
Most common: Irrelevant
 InsignificantIrrelevant
Pronunciation🇬🇧 //ɪnˈsɪɡ.nɪ.fɪ.kənt//🇺🇸 //ɪnˈsɪɡ.nɪ.fɪ.kənt//🇬🇧 /["/ɪˈreləvənt/"]/🇺🇸 /["/ɪˈreləvənt/"]/
MeaningNot important or of little value.not important or related to something
ExampleThe issue at hand is quite insignificant compared to our other priorities.His comment was irrelevant to the main topic of discussion.
RegisterNeutralNeutral
How commonTop 5,000 (fairly common)Top 2,000 (common)
CEFR level-C1
Part of speechadjective
Collocationsinsignificant difference, insignificant amount, insignificant issue, insignificant detail, insignificant roleappear, be, seem, completely, entirely, quite, to
Antonymssignificant, important, meaningfulrelevant, pertinent, applicable
Common mistakesConfused with 'significant', leading to opposite meanings., Used without a noun when it needs context., Overusing it in formal writing where simpler words might be clearer.Confused with 'relevant' - using it in the wrong context., Using as a noun when it's an adjective., Mispronouncing it (often simplified to 'ir-relevant').
Usage notesUse 'insignificant' to describe something that lacks importance. It's best for neutral contexts. Avoid using it in formal or overly casual speech.Use 'irrelevant' in academic or formal contexts when discussing information that does not relate to the main topic. Avoid using it in casual conversations.

See it in real clips

Insignificant
Irrelevant

Frequently asked questions: Insignificant vs Irrelevant

What's the difference between Insignificant and Irrelevant?

Insignificant: Not important or of little value. Irrelevant: not important or related to something

Which is more common: Insignificant and Irrelevant?

Irrelevant is the most common in everyday English.

Can you show an example of each?

Insignificant: The issue at hand is quite insignificant compared to our other priorities. Irrelevant: His comment was irrelevant to the main topic of discussion.

Can I use Insignificant and Irrelevant interchangeably?

Not always. Insignificant and Irrelevant 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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