dimensionless
dimensionless adjective: lacking dimensions.
Adjective
dimensionless (not comparable)
- Lacking dimensions.
- To Heav'n thir prayers / Flew up, nor miſsd the way, by envious windes / Blow'n vagabond or fruſtrate: in they paſsd / Dimentionleſs through Heav'nly dores; […]1674, John Milton, “Book XI”, in Paradise Lost. […], 2nd edition, London: […] S[amuel] Simmons […], →OCLC, page 286
- Extended objects may be separated by dimensionless points; but dimensionless points cannot be separated, but by some real distance, or something really extended.1771, William Kenrick, A Lecture on Perpetual Motion, London: for the author, Introduction, page 15
- Synonyms:
- adimensional
- Of a physical constant: lacking units.
- Iron has a density of 7.8 grams per cubic centimeter: its dimensionless relative density is 7.8.
- A strain is a dimensionless quantity and is usually expressed in percentages. Typical measures for strain are less than 2 mm/m for steel and are often expressed in micro-strain units. One microstrain is the strain producing deformation of one part per million.2025 September 26, Grant Maloy Smith, “What Is a Strain Gauge Sensor and How Does It Work?”, in DEWESoft, archived from the original on 14 Nov 2025
Synonyms of dimensionless
Origin of dimensionless
From dimension + -less.
Words formed from dimensionless
Phrases with dimensionless
Questions about dimensionless
- What does dimensionless mean?
- Dimensionless means lacking dimensions.
- What part of speech is dimensionless?
- Dimensionless is an adjective.
Words near dimensionless in the dictionary
Source and license
Adapted from Wiktionary: dimensionless (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
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Cite this entry: “dimensionless.” Word.ws, https://word.ws/dimensionless. Based on Wiktionary, CC BY-SA 4.0.