They mean exactly the same thing. I guess "not important" is a little less formal, but it's okay to use either in any context Answer from sazzle301 on hinative.com
Merriam-Webster
merriam-webster.com › dictionary › unimportant
UNIMPORTANT Definition & Meaning - Merriam-Webster
2 weeks ago - The meaning of UNIMPORTANT is lacking in importance : not important : minor, trivial. How to use unimportant in a sentence.
Vocabulary.com
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Unimportant - Definition, Meaning & Synonyms | Vocabulary.com
DISCLAIMER: These example sentences appear in various news sources and books to reflect the usage of the word ‘unimportant'. Views expressed in the examples do not represent the opinion of Vocabulary.com or its editors.
Why do we use “unimportant”, and not “portant”?
"Important" came to English as that word. It wasn't a negative of "portant" that was added in English to make that word. More on reddit.com
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June 23, 2019un important / not important, unnecessary / not necessary | WordReference Forums
Dear friends, I'd like to know the difference between the two terms,(unimportant or not important, unnecessary or not necessary, & not useful or useless) is there a specific preference to use... More on forum.wordreference.com
Not too important... Not too unimportant
Theory: The egg is literally just Toby fucking with us More on reddit.com
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May 23, 2018I feel very unimportant.
You need to start valuing yourself more. Your feelings and words hold value and everyone in your life should acknowledge that. And if they don’t, you’re probably just acting as a mirror for them. They say and do whatever while you just reflect what they want to hear. And that’s no way to live. As a timid, soft spoken person to another, speak up and find those who will listen. You can do it (: More on reddit.com
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Cambridge Dictionary
dictionary.cambridge.org › us › dictionary › english › unimportant
UNIMPORTANT | definition in the Cambridge English Dictionary
February 4, 2026 - UNIMPORTANT meaning: 1. not important: 2. not important: 3. not important: . Learn more.
Thesaurus.com
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UNIMPORTANT Synonyms & Antonyms - 86 words | Thesaurus.com
consequential important meaningful necessary relevant significant substantial useful valuable worthwhile worthy ... Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com. The researchers said interactions ...
Magoosh
gre.magoosh.com › definitions › unimportant
unimportant Definition - Magoosh GRE
– Not important; not of great moment; of little account. – Not assuming or marked by airs of importance or dignity.
Collins Dictionary
collinsdictionary.com › us › dictionary › english › unimportant
UNIMPORTANT definition in American English | Collins English Dictionary
If you describe something or someone as unimportant, you mean that they do not have much influence, effect, or value, and are therefore not worth serious consideration.
Published January 25, 2018
TheFreeDictionary.com
thefreedictionary.com › unimportant
Unimportant - definition of unimportant by The Free Dictionary
Define unimportant. unimportant synonyms, unimportant pronunciation, unimportant translation, English dictionary definition of unimportant. adj. Not important; insignificant or petty. un′im·por′tance n. American Heritage® Dictionary of ...
Longman
ldoceonline.com › dictionary › unimportant
unimportant | meaning of unimportant in Longman Dictionary of Contemporary English | LDOCE
Word family (noun) importance ... exact details are unimportant.Girls' education was seen as unimportant.of no/little importance not important, or not very important....
YourDictionary
yourdictionary.com › home › dictionary meanings › unimportant definition
Unimportant Definition & Meaning | YourDictionary
Unimportant definition: Not important; insignificant or petty.
Oxford Learner's Dictionaries
oxfordlearnersdictionaries.com › us › definition › english › unimportant
unimportant adjective - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com
They dismissed the problem as unimportant. This consideration was not unimportant.
Merriam-Webster
merriam-webster.com › thesaurus › unimportant
UNIMPORTANT Synonyms: 75 Similar and Opposite Words | Merriam-Webster Thesaurus
2 weeks ago - Synonyms for UNIMPORTANT: minor, small, little, trivial, worthless, insignificant, slight, inconsequential; Antonyms of UNIMPORTANT: important, major, significant, substantial, meaningful, big, momentous, consequential
Encyclopedia Britannica
britannica.com › dictionary › unimportant
Unimportant Definition & Meaning | Britannica Dictionary
[more unimportant; most unimportant] : not important · She played a relatively unimportant role in the movie. unimportant [=trivial] details/matters · [+] more examples [-] hide examples [+] Example sentences [-] Hide examples · ...
Reddit
reddit.com › r/nostupidquestions › why do we use “unimportant”, and not “portant”?
r/NoStupidQuestions on Reddit: Why do we use “unimportant”, and not “portant”?
June 23, 2019 -
Doesn’t unimportant just mean “not not portant”? And going by that rule, why don’t we say “unimpossible”, “unimmortal”, etc.?
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"Important" came to English as that word. It wasn't a negative of "portant" that was added in English to make that word.
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https://www.etymonline.com/word/important The etymology of "important" is close to the roots of "import" - as in to bring something from another country. You can't separate the roots of the term & still have that meaning, so "portant" would be a meaningless term. That's not to say that there aren't examples of spliting words up like that in a way that doesn't reflect the original meaning but, generally, we try to stick to the root meanings.
WordReference
forum.wordreference.com › english only › english only
un important / not important, unnecessary / not necessary | WordReference Forums
March 26, 2022 - Dear friends, I'd like to know the difference between the two terms,(unimportant or not important, unnecessary or not necessary, & not useful or useless) is there a specific preference to use...
Cambridge Dictionary
dictionary.cambridge.org › us › dictionary › essential-american-english › unimportant
UNIMPORTANT definition | Cambridge Essential American Dictionary
UNIMPORTANT meaning: not important. Learn more.
Quora
quora.com › What-goes-in-the-middle-of-important-and-unimportant-Whats-the-word-for-that
What goes in the middle of 'important' and 'unimportant'? What's the word for that? - Quora
For instance, if I’m drowning, the color of the water (blue, green, clear) is “irrelevant”. I’m still going to drown if I don’t get out of it. Unimportant means that something should be valued less than others.
Thesaurus.plus
thesaurus.plus › related › not_important › unimportant
Terms Not important and Unimportant are semantically related or have similar meaning
Unimportant adjective - Lacking importance. ... Not important and unimportant are semantically related.
Collins Dictionary
collinsdictionary.com › us › dictionary › english-thesaurus › unimportant
Synonyms of UNIMPORTANT | Collins American English Thesaurus
of no real importance or relevance · Whether we like him or not is immaterial. Synonyms · irrelevant, insignificant, unimportant, unnecessary, trivial, trifling, inconsequential, extraneous, inconsiderable, of no importance, of no consequence, ...
Dictionary.com
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UNIMPORTANT Definition & Meaning | Dictionary.com
UNIMPORTANT definition: lacking in significance or value See examples of unimportant used in a sentence.