As a Noun: 1. A rubber material that stretches when you pull it and returns to its original size and shape when you let it go. English = elastic. 2. A thin circle of rubber that you put around things in order to hold them together. English = rubber band, elastic band. As a Verb or Adjective: 1. To be able to be stretched easily and then return to its original shape; to be made of elastic. English = (be) elastic. 2. To stretch a piece of elastic or a rubber band.