lead‧ing1 W2 [only before noun]
best, most important, or most successful:
The army played a leading role in organizing the attempted coup.
the leading industrial nations
a leading heart specialist
leading members of the government
the part of something that is at the front of it when it moves
a respected person who leads a group or organization, or is important in a particular area of knowledge or activity:
The two women were leading lights of the women's union.
a question that deliberately tricks someone into giving the answer you want:
Don't ask leading questions.
the woman or man who acts the most important female or male part in a film, play etc