Meeting - general term indicating the coming together of a number of people in one place, to confer or carry out a particular activity. Frequency: can be on an ad hoc basis or according to a set pattern, as for instance annual general meetings, commitee meetings, etc.

Incentive - meeting event as part of a programme which is offered to its participants to reward a previous performance.

SOURCE
IAPCO (the International Association of Professional Congress Organizers) "Meetings Industry Terminology".