General Definition: 1. The act of wiping your finger or some long thin object against a flat surface, or any action or thing directly or indirectly associated with this, especially dust. As a Noun: 1. The act of brushing your finger along a surface, often in order to see how dirty it is. 2. Many tiny particles of earth or sand that float through the air and settle on things, particularly the particles that settle on surfaces and furniture in the home. English = dust. As a Verb or Adjective: 1. To brush your finger along a surface, often in order to see how dirty it is.