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."