collinear

/kəˈlɪn.i.ɚ/

//kəˈlɪn.i.ɚ// adj

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

"collinear" is a 9-letter English headword indexed on PlainSpell.

The verdict

“collinear” is uncommon English (frequency #99,117 among 43,570 “C” headwords), classed as an adjective. The kind of spelling people second-guess.

#99,117
frequency rank, English
43,570
“C” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Lying on the same straight line.

Key facts for collinear
PropertyValue
Headwordcollinear
LanguageEnglish
Part of speechAdjective
IPA/kəˈlɪn.i.ɚ/
Letters9
Frequency rank#99,117
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “collinear” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). collinear lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Rare enough to double-check

collinear is uncommon English at frequency #99,117 among 43,570 “C” headwords, classed as anadjective, transcribed /kəˈlɪn.i.ɚ/. Rarity is why readers land here mid-draft. 2 senses are on record.

Zero misspellings are on record for collinear in our index, which points to an orthography that plays by predictable English rules. It is not paired with a close-neighbour confusable in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: From col- + linear. The correct English form is collinear, spelled C-O-L-L-I-N-E-A-R.

Definition

  1. 1
    Lying on the same straight line.
  2. 2
    Coaxial.

Etymology

From col- + linear.

This word in other languages

colinéaire(Français)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "collinear"?
"collinear" is spelled C-O-L-L-I-N-E-A-R. The IPA pronunciation is /kəˈlɪn.i.ɚ/.
What does "collinear" mean?
As an adjective, "collinear" means: Lying on the same straight line.
How do you pronounce "collinear"?
The IPA (International Phonetic Alphabet) transcription for "collinear" is /kəˈlɪn.i.ɚ/. 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 "collinear"?
From col- + linear. 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.

Using “collinear”

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

  • The one correct English spelling is C-O-L-L-I-N-E-A-R - every other letter order is a misspelling in standard orthography.
  • Say it as /kəˈlɪn.i.ɚ/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words

Other uncommon English words near this rank

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