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WordNet-Online 
 Definitions from WordNet
Noun incidental expense has 1 sense 
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| Definitions from the WebTerm: Incidental ExpenseDefinition: An unplanned or unexpected expense that is not considered the main or primary cost. Examples of Usage:
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| incidence  incidence angle incidencs incident incident report incident to incidental incidental  incidental expense incidental light incidental music incidental to incidental to predicate  incidentally incidentary incidently incidents 
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