convection

IPA/kənˈvekʃn/
KK[kənvˈɛkʃən]IPA/kənˈvekʃn/

convection — noun

1. The movement of heat inside a liquid or a gas, which takes place as warmer fluid

1.nounB2
Definition

The movement of heat inside a liquid or a gas, which takes place as warmer fluid rises upward and cooler fluid sinks downward.

Example

In the saucepan, convection made the soup at the bottom rise as it heated up.

natural process in a heated liquid

During summer, convection creates the strong winds that bring afternoon thunderstorms.

weather context: thunderstorm formation

Common collocations
  • convection current
  • convection oven
  • natural convection
  • heat by convection
Synonyms
  • heat transfer

    broader term that includes conduction and radiation as well; convection is one specific type

Antonyms
  • conduction

    transfers heat through direct contact in solids, not through fluid movement

Usage Note

Frequently used as a modifier in compound nouns such as 'convection oven' or 'convection current'. In science writing, often paired with 'conduction' and 'radiation' as the three main types of heat transfer.

Common Mistakes

The heat spreads by conduction through the boiling water.
The heat spreads by convection through the boiling water.
Conduction transfers heat through solid materials, while convection transfers heat through fluids like water.
The hot air rises by convection current.
The hot air rises by convection.
'Convection current' is a related term but 'convection' alone already describes the process; avoid redundant phrasing.

Word family

  • convect
    verbC1
  • convective
    adjectiveC1
  • convectional
    adjectiveC2
  • convection oven
    nounB2

Synonym discussion

Sense: noun/1

Convection is one of three main types of heat transfer, alongside conduction and radiation. Conduction moves heat through direct contact between solid materials — think of a metal spoon heating up in hot soup. Radiation travels as electromagnetic waves, like the warmth you feel from sunlight. Convection is distinct because it only happens in fluids (liquids or gases), relying on the physical movement of the fluid itself. Circulation is a related but broader concept that refers to any circular movement within a fluid, whether or not heat is involved. For example, ocean currents can be driven by wind rather than temperature differences. In daily conversation, 'convection' is most common when talking about weather systems, cooking appliances (convection ovens), and home heating.

heat transferconduction ↗radiation ↗circulation ↗

Common collocations

Nouns

Adverbs

Phrases

  • heat transfer by convection
  • convection in the atmosphere
  • natural convection

Prepositions

Etymology

LatinEnglish

From the Latin word 'convectionem', meaning 'the act of carrying together'. It is built from 'con-' (together) and 'vehere' (to carry). The word first appeared in English in the 1800s when physicists needed a term for heat moving together with the fluid that carries it.