5150

/ˈfɪf.ti.wənˈfɪf.ti/

//ˈfɪf.ti.wənˈfɪf.ti// noun

"5150" is a 0-letter English headword indexed on PlainSpell.

The verdict

“5150” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
4
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - One who should be involuntarily confined.

Corpus desk

Index EN-5150 · 5150 · English

5150 · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MID 4 letters
  • VOW-0 0 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "5" 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 5150
PropertyValue
Headword5150
LanguageEnglish
Part of speechNoun
IPA/ˈfɪf.ti.wənˈfɪf.ti/
Letters4
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “5150” in English

5150sits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

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

Rare enough to double-check

5150 is uncommon English outside the top frequency list, classed as anoun, transcribed /ˈfɪf.ti.wənˈfɪf.ti/. Rarity is why readers land here mid-draft. Gloss: "One who should be involuntarily confined.".

No misspelling variants are generated for 5150 in our index, since its letter sequence doesn't invite the usual edit-distance slips. Our confusable-pair dataset has no match for it, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: From Article 1, Section 5150 of California's Welfare and Institutions Code, signed into law in 1967, regarding involuntary commitment for psychological evaluation and treatment. Popularized outside of California due to the spread of popular media produced i… The correct English form is 5150, spelled 5-1-5-0.

Definition

  1. 1
    One who should be involuntarily confined.

Etymology

From Article 1, Section 5150 of California's Welfare and Institutions Code, signed into law in 1967, regarding involuntary commitment for psychological evaluation and treatment. Popularized outside of California due to the spread of popular media produced in the state.

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 "5150"?
"5150" is spelled 5-1-5-0. The IPA pronunciation is /ˈfɪf.ti.wənˈfɪf.ti/.
What does "5150" mean?
As a noun, "5150" means: One who should be involuntarily confined.
How do you pronounce "5150"?
The IPA (International Phonetic Alphabet) transcription for "5150" is /ˈfɪf.ti.wənˈfɪf.ti/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "5150"?
From Article 1, Section 5150 of California's Welfare and Institutions Code, signed into law in 1967, regarding involuntary commitment for psychological evaluation and treatment. Popularized outside of California due to the spread of popular media ... See the full etymology section above for more details.
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