aerodynamic

IPA/ˌeərəʊdaɪˈnæmɪk/
KK[ˌɛrodaɪnˈæmɪk]IPA/ˌerəʊdaɪˈnæmɪk/

aerodynamic — adjective

  • aerodynamicpositive
  • more aerodynamiccomparative
  • most aerodynamicsuperlative

1. designed with a smooth, curved outer surface so that air flows over or around th

1.adjectiveB2
Definition

designed with a smooth, curved outer surface so that air flows over or around the object easily, which reduces drag and improves speed or energy efficiency — for example, a streamlined car, bicycle helmet, or train.

Example

Samir chose an aerodynamic racing bike for the long-distance competition.

collocation: aerodynamic racing bike

The new bullet train's aerodynamic shape helps it reach higher speeds while using less energy.

collocation: aerodynamic shape

Common collocations
  • aerodynamic shape
  • aerodynamic design
  • aerodynamic body
  • aerodynamic profile
  • aerodynamic drag
  • aerodynamic efficiency
Synonyms
  • streamlined

    nearly identical meaning; slightly more common in everyday English for describing cars, trains, and boats

  • sleek

    emphasises smoothness and elegance as well as low resistance; often used for appearance rather than strict engineering performance

  • slippery

    informal; describes something that slides through air easily, but less precise

Antonyms
  • boxy

    square-shaped with flat surfaces that create high air resistance

  • bulky

    large and awkward in shape, causing drag

Grammar Patterns

aerodynamic + noun

be/look/seem + aerodynamic

highly/very/extremely + aerodynamic

Usage Note

This is the most frequent everyday sense. It focuses on the visible design feature of low air resistance. Frequently used with intensifiers like 'very', 'highly', or 'extremely'. ⚠️ Objects that are small, round, or flat are NOT aerodynamic — the shape must actively guide air past the surface.

Common Mistakes

Paper airplanes are not aerodynamic.
Paper airplanes are simple, but their folded shape can be quite aerodynamic.
Even a simple paper airplane is designed to glide; aerodynamic describes any shape that reduces air resistance.
The rock is aerodynamic because it is small and light.
The rock is small and light, but its irregular shape creates a lot of air resistance
it is not aerodynamic.' — Aerodynamic depends on shape, not size or weight.

2. relating to the branch of physics that studies how gases move and how objects su

2.adjectiveB2
Definition

relating to the branch of physics that studies how gases move and how objects such as planes, cars, or birds travel through air.

Example

The engineering team studied the aerodynamic forces acting on the new aircraft wing.

collocation: aerodynamic forces

Professor Nicholas gave a lecture on aerodynamic theory to first-year aerospace students.

collocation: aerodynamic theory

Common collocations
  • aerodynamic forces
  • aerodynamic theory
  • aerodynamic principles
  • aerodynamic research
  • aerodynamic properties
  • aerodynamic behaviour
Synonyms
  • aeronautical

    broader field covering all aspects of aircraft design and operation, not just air movement science

  • fluid-dynamic

    more technical term that includes liquids as well as gases

Grammar Patterns

aerodynamic + noun

be + aerodynamic

Usage Note

Distinguish from sense 1: this sense describes the scientific study of air movement, not the physical design quality of an object. ⚠️ Attributive use (aerodynamic + noun) is much more common than predicative use (is aerodynamic).

Common Mistakes

A hot air balloon is aerodynamic because it floats in the sky.
A hot air balloon floats because hot air is lighter than cold air, but its round shape creates a lot of drag
it is not aerodynamic.' — Aerodynamic describes how air flows around an object, not whether something can float or rise.

Word family

  • aerodynamics
    nounB2
  • aerodynamicist
    nounC1
  • aerodynamically
    adverbB2

Synonym discussion

Sense: adjective/1

All three words describe objects designed for smooth movement through air, but they differ in scope and focus. 'Aerodynamic' is the most technical term — it refers specifically to the engineering property of low air resistance, measured and proven through wind-tunnel testing. 'Streamlined' overlaps heavily with aerodynamic but is more common in everyday language and can describe systems or processes metaphorically (e.g., 'a streamlined application process'). 'Sleek' is primarily a visual term: a sleek car looks smooth and elegant, even if its actual drag coefficient is not especially low. In product descriptions, a 'sleek, aerodynamic design' marries appearance and function. For a strictly engineering context, use 'aerodynamic'; for general-purpose description of shape, 'streamlined' fits best; for appearance-first contexts, 'sleek' is the right choice.

streamlined ↗sleek ↗aerodynamic ↗

Common collocations

Nouns

Adverbs

Phrases

  • aerodynamic performance
  • aerodynamic drag coefficient

Etymology

GreekFrenchEnglish

The word 'aerodynamic' was formed in the mid-19th century from the Greek prefix 'aero-' (air) and the Greek word 'dynamis' (power or force). It was first used to describe the new science of how air exerts force on moving objects, which developed alongside the invention of the steam engine and early aircraft. The term 'aerodynamics' (the noun) appeared first in the 1830s, and 'aerodynamic' as an adjective followed shortly after.

First known use

1848

1848, in the meaning defined above