Home › Forums › setting the stage › solids as quantum systems › Definition of a solid This topic has 0 replies, 1 voice, and was last updated 2 years ago by quimico69. Viewing 1 post (of 1 total) Author Posts November 22, 2022 at 6:06 pm #7925 quimico69Participant A solid is a substance that opposes resistance to changes in volume and shape. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In