chairman-n; 4 Senses

Sense Number 1: officer who presides at a meeting of an organization

Commentary: CHAIRMAN[+entity][+person][+officer][+of_meetng] [+relation][+role][+supervisor][+of_meeting] president, chairwoman, chairman, chairperson, chair - the officer who presides at the meetings of an organization
NOTE: can imply a temporary, stand-in role (one meeting) or a general role

Address your remarks to the chairman of the meeting.
Bob will be chairman this evening as Mary could not attend the meeting.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: the administrative head of an academic department

Commentary: CHAIRMAN[+entity][+person][+administrator][+head][+of_department][+academic] [+relation][+role][+administrator][+of_department]
NOTE: implies a long-standing role in a department,

Who is now chairman of the philosophy department?
After John received tenure, he became chairman of the economics department for two years.

WordNet 0.0 Sense Numbers: 2

Sense Number 3: the bearer or carrier of a sedan

Commentary: A person who carries a chair, transports a person in a chair, sedan
NOTE: somewhat archaic usage

The gentleman hailed a chairman to carry him back to his hotel.

WordNet 0.0 Sense Numbers: 3

Sense Number 4: none of the above

Commentary: Automatically generated NOTA sense (bbn)