useful Definition

  • 1able to be used for a practical purpose or in several ways
  • 2helpful or beneficial in a particular situation or context

Using useful: Examples

Take a moment to familiarize yourself with how "useful" can be used in various situations through the following examples!

  • Example

    This book is very useful for learning English grammar.

  • Example

    The information provided by the website was very useful.

  • Example

    The new software has many useful features.

  • Example

    I always carry a Swiss Army knife because it's so useful.

useful Synonyms and Antonyms

Phrases with useful

  • useful idiot

    a person who unwittingly supports a cause or organization that is ultimately harmful to their own interests


    He was a useful idiot for the corrupt politicians, not realizing that he was being used for their own gain.

  • the period of time during which an asset remains useful to the owner


    The useful life of a car can vary depending on how well it is maintained and how much it is used.

  • work that produces a useful result or output


    The machine was designed to perform useful work with minimal energy consumption.


Summary: useful in Brief

The term 'useful' [ˈjuːsfʊl] refers to something that is practical, helpful, or beneficial in a particular situation. It can be applied to objects like books, software, or tools, as well as to people who may be unwittingly supporting a harmful cause. 'Useful' is often used in phrases like 'useful life' and 'useful work,' and can be replaced with synonyms like 'helpful' or 'beneficial.'

How do native speakers use this expression?