cubic: meaning, definition, pronunciation and examples
B2Neutral to formal; common in academic, scientific, technical, and everyday descriptive contexts.
Quick answer
What does “cubic” mean?
Shaped like a cube.
Audio
Pronunciation
Definition
Meaning and Definition
Shaped like a cube; having three dimensions (length, width, and height) and sides of equal or unequal length that meet at right angles.
1. Denoting a unit of volume equal to that of a cube with sides of a specified length (e.g., cubic metre). 2. (Mathematics) Involving the cube (third power) of a quantity, or relating to an equation of the third degree.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning. Spelling conventions in compound units: BrE 'cubic metre', AmE 'cubic meter'. Pronunciation of 'cubic' is consistent.
Connotations
Identical in both variants.
Frequency
Equally common in both varieties due to its technical and scientific nature.
Grammar
How to Use “cubic” in a Sentence
cubic + noun (unit of measurement: metre, foot)cubic + noun (mathematical term: equation, function)verb + cubic (measure, calculate, express in cubic)Vocabulary
Collocations
Examples
Examples of “cubic” in a Sentence
adjective
British English
- The storage box has a cubic capacity of 50 litres.
- We need to calculate the cubic volume of the pond.
- Cubic zirconia is a popular diamond alternative.
American English
- The freezer has 15 cubic feet of space.
- He solved the complex cubic equation.
- The sculpture had a clean, cubic form.
Usage
Meaning in Context
Business
Rare, except in specific industries like shipping ('cubic capacity of a container'), construction, or mining.
Academic
Frequent in mathematics, geometry, physics, chemistry, and engineering to describe volume, equations, or crystal structures.
Everyday
Common when discussing the size of rooms, fridges, or car boot space. Also known from 'cubic zirconia' (a diamond simulant).
Technical
Essential for precise measurement of volume (cubic metres of concrete, cubic feet of gas). Central to algebra (cubic equations).
Watch out
Common Mistakes When Using “cubic”
- Using 'cubic' to describe square area (2D) instead of volume (3D). Incorrect: 'The room is 20 cubic metres.' (if referring to floor area). Correct: 'The room has a volume of 20 cubic metres.'
- Misspelling as 'cubical' (which means 'of or related to a cubicle').
FAQ
Frequently Asked Questions
No, while central to maths (cubic equations, volume), it's also used in everyday language (cubic shape, cubic capacity of appliances) and science (cubic crystal structure).
'Cubic' refers to the shape or properties of a cube. 'Cubical' is a less common adjective meaning 'like a cubicle' (a small compartment).
It's pronounced /ˈkjuː.bɪk/ (KYOO-bik) in both British and American English, with stress on the first syllable.
Rarely. In specialised contexts, a 'cubic' can be short for a 'cubic equation' or 'cubic curve'. Its standard use is as an adjective.
Shaped like a cube.
Cubic is usually neutral to formal; common in academic, scientific, technical, and everyday descriptive contexts. in register.
Learning
Memory Aids
Mnemonic
Imagine a big, clear **CUBE**. Inside it, the letters I and C are floating. The word 'cube' is in 'cubic'.
Conceptual Metaphor
QUANTITY/AMOUNT IS VOLUME (e.g., 'cubic miles of data' to imply vastness).
Practice
Quiz
In which context is the word 'cubic' used INCORRECTLY?