Definition of substances in the idioms dictionary substances phrase what does substances expression mean definitions by the largest idiom dictionary a 2011 eurobarometer on youth attitudes on drugs shows that on average 5 of young people in the eu have used such substances at least once in their life with a peak of 16 in ireland . In substance 1 concerning or related to the essential elements fundamentally or substantially in substance the proposed bill would reduce the amount of calories in meals served at school cafeterias though the details of how this would be implemented arent yet clear 2 actually in reality i was promoted to a managerial role in the restaurant . Dictionary of substances and their effects dose 3rd electronic edition details this 2005 electronic version of the original seven volume collection of vital information has been updated to contain approximately 5300 chemicals and their impact on the environment detailed information about the toxicity of the chemicals physical properties . Substance definition that of which a thing consists physical matter or material form and substance see more. Substance meaning 1 material with particular physical characteristics 2 an illegal drug 3 the most important part of what someone has said or written learn more
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