- The definition of useful is helpful or beneficial.
An example of useful used as an adjective is the phrase "useful information" which means information that is helpful.
useful definition by Webster's New World
that can be used to advantage; serviceable; helpful; beneficial; often, having practical utility
useful definition by American Heritage Dictionary
- Having a beneficial use; serviceable: a useful kitchen gadget.
- Being of practical use: a useful job; useful members of society.
- useˈful·ly adverb
- useˈful·ness noun