functioning Meaning, Definition & Usage

1. noun process or manner of functioning or operating
   performance; operation.
   
   • the power of its engine determines its operation
   • the plane's operation in high winds
   • they compared the cooking performance of each oven
   • the jet's performance conformed to high standards
2. verb perform as expected when applied
   function; go; work; run; operate.
   
   • The washing machine won't go unless it's plugged in
   • Does this old car still run well?
   • This old radio doesn't work anymore
3. verb serve a purpose, role, or function
   function; serve.
   
   • The tree stump serves as a table
   • The female students served as a control group
   • This table would serve very well
   • His freedom served him well
   • The table functions as a desk
4. verb perform duties attached to a particular office or place or function
   function; officiate.
   
   • His wife officiated as his private secretary
5. adjective performing or able to perform its regular function
   
   • a functioning flashlight

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