Jan 3, 2015 · The meaning of SUBSTANCE is essential nature : essence. How to use substance in a sentence.

Jul 12, 2024 · In chemistry, a substance is any form of matter that has a uniform and unchanging composition. This means that a substance is made of the same material throughout and has …

An ecosystem is a system controlled by the flow of energy, and substances such as water, carbon and phosphorus, exchanged among living things.

Any material that possesses physical properties is called a substance. The word also refers to the gist or main idea of something. If you remember the main point of a lesson, you've got the …

Chemical substances can exist in several different physical states or phases (e.g. solids, liquids, gases, or plasma) without changing their chemical composition. Substances transition …

Definition of substance noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

A drug, chemical, or other material (such as glue) that one is dependent on or uses habitually and that is often illegal or subject to government regulation: Which substance was he abusing? 2. …

Chemistry a particular kind of material, as of a definite chemical composition:[countable] a metallic substance. substantial, important, significant, or solid character or quality:[uncountable] Those …

Every pure element is a substance. Every pure compound is a substance. Examples of substances: Iron is an element and hence is also a substance. Methane is a compound and …

Substance is the quality of being important or significant. It's questionable whether anything of substance has been achieved. Syria will attend only if the negotiations deal with issues of …