Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Point man \Point" man`\, n.; pl. -men (-men).
(Mil.) the lead soldier in a foot patrol under combat conditions.
a person who takes a conspicuous public position in proposing a new idea or initiating a new policy, who may become a target of criticism for those opposed. ``The Secretary of State served as point man for the administration's new China policy.''
Douglas Harper's Etymology Dictionary
WordNet
n. someone who is the forefront of an important enterprise; "he is the president's point man on economic issues"
a soldier who goes ahead of a patrol
Usage examples of "point man".
From the time the point man entered the living room, less than an hour had elapsed.
The two of them were covering the right flank of the company, slightly out of line with the point man and fifty meters back.