#gratuity  an award (as for meritorious service) given without claim or obligation
  supertype:  award__prize  something given for victory or superiority in a contest or competition; "the prize was a free trip to Europe"
     supertype:  gift  something acquired without compensation
        supertype:  acquisition.transferred_property  something acquired; "a recent acquisition by the museum"
           supertype:  transferred_property__transferredproperty__transferred_possession__transferredpossession  a possession whose ownership changes or lapses
              supertype:  possession  anything owned or possessed
                 supertype:  owned_entity__ownedentity
                    supertype:  entity_playing_some_role  e.g., an agent, an owner
                       supertype:  entity  something that can be "involved" in a situation
                          supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                       supertype:  thing_that_can_be_seen_as_a_relation  usable as relation type
                          supertype:  thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                             supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

No statement uses or specializes gratuity; click here to add one.