English Reference

Word

component

Phoneticscom·po·nent

US/kəmˈpoʊnənt/

UK/kəmpˈəʊnənt/

Definitions

01a part of a machine or system

B2 · Technical

n. one of the individual parts that makes up a machine or a piece of equipment.

n. a physical part of a mechanical or electronic device, often manufactured as a discrete unit.

“The technician replaced a broken component in the computer's cooling system.”

“The manufacturer sources high-quality electronic components from several different suppliers to ensure the final product meets safety standards.”

General-service

Synonyms

Antonyms

02a part of an idea or plan

B2

n. a part of a larger plan, idea, or situation.

n. a constituent element of a conceptual whole, such as a strategy, curriculum, or chemical mixture.

“Regular exercise is a vital component of a healthy lifestyle.”

“The research team identified three key components of the economic crisis that had been overlooked by previous analysts.”

Academic

03forming a whole

C1

adj. describing the parts that make up a larger thing.

adj. serving as one of the parts of a whole; non-gradable and typically used before a noun.

“The scientist broke the substance down into its component parts.”

“By examining the component elements of the alloy, the engineers were able to determine why the structure failed under pressure.”

Academic · Formal

Usage

Always used before a noun.

Real-World Examples

“The $25 mail-order kit came with instructions on how to skin the board and attach the necessary components.”
Smithsonian Magazine · 12 Aug 2026
“It would take vaccine manufacturers a decade to separate the MMR vaccine into its three different components.”
The Conversation · 12 Aug 2026
“Our study also highlighted how economic well-being influences other components of a person’s overall well-being, such as their mental, emotional or social health.”
The Conversation · 5 Aug 2026
“Adding everything else in, such as a bus (backbone), GPUs, and other components, the satellites will likely weigh between 3.5 and 7.5 metric tons.”
Ars Technica · 15 Jul 2026

Etymology

Borrowed from Latin compōnēns, compōnēntis, present participle of compōnō (“assemble, put together”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Collocations

components neededadd componentadditional componentcentral componentcomponent consistcontain componentcritical componentcrucial component

Word family

This entry

Level
B2 · Upper Intermediate
Frequency
Common
Updated

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