selector{
  transition: property1  duration  timing-function  delay,
                   property2  duration  timing-function  delay;
}

selector:hover {
  property1:desired-value;
  property2:desired-value;
}


  * Duration is required; timing-function and delay are optional.
  See w3schools for specifics on duration, timing-function and delay 
  -- http://www.w3schools.com/cssref/css3_pr_transition.asp


OR, just handle all transitioned properties across the board, quickly:


selector{
  transition: all duration timing-function;
}

selector:hover {
  property1:desired-value;
  property2:desired-value;
  property3:desired-value;
  property4:desired-value;
}