component

component — noun

1. any of the separate pieces, elements, or features that combine to form a larger

1.nounB2
Definition

any of the separate pieces, elements, or features that combine to form a larger system, machine, structure, or process

Example

The lab technician checked each component of the microscope before the experiment began.

of the [device / system]

One key component of a healthy lifestyle is getting enough sleep every night.

abstract use: key component of [something]

Common collocations
  • key component
  • essential component
  • major component
  • critical component
  • individual component
  • component of
Synonyms
  • part

    more general and common; component suggests a separate piece with a specific function

  • element

    suggests a basic or fundamental building block, especially in abstract or scientific contexts

  • constituent

    more formal; often used in technical, political, or scientific writing

  • ingredient

    used when things are mixed together, most literally in cooking but also metaphorically

Usage Note

Frequently followed by 'of' to show what the component belongs to (e.g., 'a component of the engine'). Can describe both physical objects (machine parts) and abstract concepts (elements of a plan).

Common Mistakes

This machine has many component.
This machine has many components.
Component is a countable noun and needs a plural form when there is more than one.
The component for this system are made in Japan.
The components for this system are made in Japan.
Use the plural form when referring to multiple parts.

component — adjective

Word family

Synonym discussion

Sense: noun/1

All four words describe something that belongs to or makes up a larger whole, but they differ in how specific they are. Part is the most general and common — anything from a broken handle to a chapter in a book can be called a part. Component is more specific: it suggests a separate, identifiable piece with a particular function, especially in a system or machine. Element emphasizes that something is a basic or fundamental building block, commonly used in science (the elements of a chemical compound) or abstract contexts (the elements of a good story). Ingredient is tied to mixtures — literally in recipes, but also metaphorically (the ingredients of success). Constituent is the most formal and appears in political, technical, or legal writing (the constituent parts of a treaty). For everyday speech, part or component work best; for formal analysis, constituent or element are more appropriate.

part ↗element ↗ingredient ↗constituent ↗

Common collocations

Nouns

Adverbs

Phrases

  • component parts
  • component elements

Prepositions

Etymology

LatinEnglish

Component comes from the Latin verb componere, meaning 'to put together' — built from com- ('together') and ponere ('to put'). The present participle componentem ('putting together') entered English as a noun in the 1500s, referring to something that is put together with other things to form a whole.