grown-up

noun

"grown-up" is a 7-letter English headword indexed on PlainSpell.

The verdict

“grown-up” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
8
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An adult.

Corpus desk

Index EN-grown-up · grown-up · English

grown-up · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 8 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "G" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for grown-up
PropertyValue
Headwordgrown-up
LanguageEnglish
Part of speechNoun
Letters8
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “grown-up” in English

grown-upfalls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

grown-up is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "An adult.".

We couldn't generate a plausible misspelling set for grown-up, and the word's spelling is regular enough that our generator found nothing worth flagging. This entry stands alone in our confusable dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Our source data has no etymology on file for this entry, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct English form is grown-up, spelled G-R-O-W-N---U-P.

Definition

  1. 1
    An adult.

Recorded use

Wiktionary examples

These source excerpts show how grown-up appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. They stayed together during three dances, went out on to the terrace, explored wherever they were permitted to explore, paid two visits to the buffet, and enjoyed themselves much in the same way as if they had been school-children surreptitiously breaking loose from an assembly of grown-ups.
  2. Do you think the grown-ups will have the world fixed up by the time they hand it over to us?

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "grown-up"?
"grown-up" is spelled G-R-O-W-N---U-P.
What does "grown-up" mean?
As a noun, "grown-up" means: An adult.
What language does "grown-up" come from?
"grown-up" is a English word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list