Definition of Functioning

Adjective: functioning  fúngk-shu-ning

1. Performing or able to perform its regular function
   "a functioning flashlight"

Noun: functioning  fúngk-shu-ning

1. Process or manner of functioning or operating
   "the power of its engine determines its functioning";
   - operation, performance

Verb: function  fúngk-shun

1. Perform as expected when applied
   "This old radio doesn't function anymore";
   - work, operate, go, run
    
2. Act to fulfil a purpose, role, or function
   "The table functions as a desk";
   - serve
    
3. Perform duties attached to a particular office, place or function
   "His wife functioned as his private secretary";
   - officiate

See also:
functioned
functionless