Substance | Mean of substance in English Dictionary

/ˈsʌbstəns/

• Noun
• a material of a particular kind
1. chemical/toxic/hazardous/dangerous substances
2. The pancreas secretes a substance called insulin.
3. The floor was covered with a white, powdery substance that turned out to be flour.
• a drug that is considered harmful and whose use is controlled by law or made illegal
1. heroin and other illegal substances
2. He had a history of substance abuse.
3. Codeine is a controlled substance. [=a drug that you need permission from a doctor to use]
• the quality of being meaningful, useful, or important
1. matters of substance
2. When has he ever said anything of substance?
3. The book lacks substance.

• the quality of being true or believable
1. These rumors have no substance. = These rumors are without substance. [=these rumors are not true]
2. The results of the study give substance to their theory.
• the most basic or necessary part or quality of something
1. the substance of my argument
2. These two books differ in both style and substance. [=content]
3. He stated, in substance [=in essence, essentially], that it is not his fault and he will not pay for damages.
• a person who is rich and powerful
1. She married a man of substance.