Home › Forums › setting the stage › solids as quantum systems › Definition of Solid This topic has 0 replies, 1 voice, and was last updated 3 days, 21 hours ago by tripathi.csp. Viewing 1 post (of 1 total) Author Posts September 5, 2025 at 9:28 am #12852 tripathi.cspParticipant A solid is a state of matter that has a fixed shape and a fixed volume. 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