Definition of "Leading" :
noun: the activity of leading
noun: thin strip of metal used to separate lines of type in printing
adjective: going or proceeding or going in advance; showing the way
"We rode in the leading car."
adjective: indicating the most important performer or role
"The leading man."
adjective: greatest in importance or degree or significance or achievement
"The country's leading poet."
adjective: having the leading position or higher score in a contest
"The leading team in the pennant race."