Wordnet 3.0
NOUN (1)
1. 
 the act of driving an automobile; 
The Collaborative International Dictionary of English v.0.48:
Motoring \Mo"tor*ing\, n.
   the act or recreation of riding in or driving a motor car or
   automobile.
   [Webster 1913 Suppl.]
The Collaborative International Dictionary of English v.0.48:
Motoring \Mo"tor*ing\, a.
   Pertaining to motor cars or automobiles, or to the technology
   of such; addicted to riding in or driving automobiles; as,
   motoring parlance; my motoring friend.
   [Webster 1913 Suppl.]
WordNet (r) 3.0 (2006):
motoring
    n 1: the act of driving an automobile