sign up

verb

By · According to Wiktionary data (CC BY-SA) ·

"sign-up" is a 6-letter English headword indexed on PlainSpell.

The verdict

“sign up” is outside the top-ranked English vocabulary, used as a verb - the kind of word writers most often double-check.

Unranked
below top-frequency English
7
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - To add a name to the list of people who are participating in something.

Key facts for sign up
PropertyValue
Headwordsign up
LanguageEnglish
Part of speechVerb
Letters7
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “sign up” sits in English frequency

sign up falls 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.

Spelling & Dictionary Insight

The English entry for sign up is 7 letters long, classified as a verb. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.

Our edit-distance generator produced no likely misspellings for sign up, since its letter sequence doesn't invite the usual edit-distance slips. It is not paired with a close-neighbour confusable in our dataset, which typically means the spelling is too distinctive to be mistaken for another word.

No documented word history exists for this headword, so its spelling is best read as a straightforward mapping from sound to letter. The correct English form is sign up, spelled S-I-G-N- -U-P.

Definition

  1. 1
    To add a name to the list of people who are participating in something.
  2. 2
    To add one's own name to the list of people who are participating in something (including amateur, but not professional, teams).
  3. 3
    To agree to purchase some good or service.
  4. 4
    To enlist in the armed forces.

This word in other languages

inscribir(Español)inscrire(Français)einschreiben(Deutsch)subscrever(Português)

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 "sign up"?
"sign up" is spelled S-I-G-N- -U-P.
What does "sign up" mean?
As a verb, "sign up" means: To add a name to the list of people who are participating in something.
What language does "sign up" come from?
"sign up" is a English word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
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.

Using “sign up”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is S-I-G-N- -U-P - every other letter order is a misspelling in standard orthography.
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list