Word parts elastic + -ity Pronunciation (UK) IPA (key): /ɪ.læsˈtɪs.ɪ.ti/ Audio (US)(file) Noun Singular elasticity Plural elasticities The elasticity of something is how elastic the thing is. (physics) The elasticity is the property of a material that is deformed under load can regain its original shape and size when unloaded. (economics) The elasticity of A is how sensitive its quantity changes when B changes in another quantity.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads