English Reference
noun · adjective

component

n. · adj.
US /kəmˈpoʊnənt/ UK /kəmpˈəʊnənt/ com·po·nent UK spelling component's, component's

  1. 01 B2 Upper Intermediate General-service 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.

    Simple

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

    In context

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

  2. 02 B2 Upper Intermediate Academic

    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.

    Simple

    Regular exercise is a vital component of a healthy lifestyle.

    In context

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

  3. 03 C1 Advanced AcademicFormal

    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.

    Simple

    The scientist broke the substance down into its component parts.

    In context

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

    Usage

    Always used before a noun.

Usage components needed · add component · additional component

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

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

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

This entry
Level B2 · Upper Intermediate
Frequency Common
Updated