dimensionless

adj

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

"dimensionless" is a 13-letter English headword indexed on PlainSpell.

The verdict

“dimensionless” is uncommon English (frequency #65,053 among 26,416 “D” headwords), classed as an adjective. The kind of spelling people second-guess.

#65,053
frequency rank, English
26,416
“D” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Lacking dimensions.

Key facts for dimensionless
PropertyValue
Headworddimensionless
LanguageEnglish
Part of speechAdjective
Letters13
Frequency rank#65,053
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “dimensionless” 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). dimensionless 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

dimensionless is uncommon English at frequency #65,053 among 26,416 “D” headwords, classed as anadjective. Rarity is why readers land here mid-draft. 2 senses are on record.

Our edit-distance generator produced no likely misspellings for dimensionless, since its letter pattern doesn't lend itself to common typo substitutions. 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 dimension + -less. The correct English form is dimensionless, spelled D-I-M-E-N-S-I-O-N-L-E-S-S.

Definition

  1. 1
    Lacking dimensions.
  2. 2
    Of a physical constant: lacking units.

Etymology

From dimension + -less.

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 "dimensionless"?
"dimensionless" is spelled D-I-M-E-N-S-I-O-N-L-E-S-S.
What does "dimensionless" mean?
As an adjective, "dimensionless" means: Lacking dimensions.
What is the origin of the word "dimensionless"?
From dimension + -less. 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 “dimensionless”

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

  • The one correct English spelling is D-I-M-E-N-S-I-O-N-L-E-S-S - every other letter order is a misspelling in standard orthography.
  • 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