General Definition: 1. The action of rubbing something between your hands, or any thing or any action directly or indirectly associated with this, especially plasticine. As a Noun: 1. The trade name (trademark) for a soft coloured substance like clay which children use for making little models, called plasticine. As a Verb or Adjective: 1. To roll plasticine together between your hands; to play with plasticine.