What does centimeter mean?
A centimeter is a fundamental metric unit of length, defined as one hundredth of a metre. Roughly equivalent to 0.394 inches, it occupies a practical middle ground in measurement: large enough to describe everyday objects like books, phones, or body dimensions, yet fine enough for tailoring, carpentry, and medical assessments. The word derives from French 'centimètre', combining Latin 'centum' (hundred) with Greek-derived 'metron' (measure). Spelled with an -re ending in British English and -er in American English, it is universally understood across English-speaking regions. Centimeters appear on standard rulers alongside millimetres, making them among the first units children learn. Beyond literal measurement, the word occasionally appears figuratively — someone might win a race by 'a centimeter,' meaning by a hair's breadth. Its clarity and international consistency have made it indispensable in science, engineering, medicine, and daily life worldwide.
nounA metric unit of length equal to one hundredth of a metre (0.01 m), or about 0.394 inches. It is commonly used for everyday measurements of small distances and object dimensions.
- A metric unit of length equal to one hundredth of a metre, used worldwide for everyday measurements.
- A small amount or short distance, used figuratively or informally to suggest something tiny or marginal.
"The tailor measured the hem and found it two centimeters too long."
"The insect was barely half a centimeter long, yet its wings were intricately patterned."
"He missed breaking his personal record by just one centimeter."
In British English, spelled 'centimetres'. The singular form is used after numbers when describing a single unit ('one centimeter'), while the plural follows all other numerals greater than one.
"The gap between the shelves narrowed to three centimeters."
The word 'centimeter' packs two Latin roots into five syllables — 'hundredth' and 'measure' — so every time you say it, you're literally saying 'one-hundredth measure.'
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of centimeter
The word 'centimeter' entered English from French 'centimètre', coined in the late eighteenth century during the creation of the metric system following the French Revolution. It combines Latin 'centum' (meaning hundred), also seen in 'century' and 'percent', with 'metre', which traces back through French to Greek 'metron' (measure). Cognates using the same roots include 'millimeter', 'kilometer', and 'centigram'.
Related word forms
How centimeter is actually used
Spelled 'centimetre' in British English and most other varieties; 'centimeter' is the standard American spelling. The word belongs to neutral, technical-everyday register — appropriate in both scientific writing and casual conversation. In American usage, inches often replace centimeters in informal contexts, though scientific fields universally use metric units.
Easily confused with centimeter
A millimeter is one tenth of a centimeter, so it is ten times smaller.
An inch is an imperial unit equal to exactly 2.54 centimeters.
This is simply the British spelling of the same word, not a different unit.