Substances: meaning, definitions and examples

This term is used in a general sense to refer to any kind of material, whether they are solid, liquid, or gas. It can be used in everyday life or in scientific contexts to talk about different types of materials.

• Certain substances can be harmful if inhaled.
• The bottle contains a mysterious substance we need to test.

This term is used broadly to describe the physical substances or matter used in making or doing things. It is frequently used in industrial, construction, and manufacturing settings.

• The construction site ran out of building materials.
• She picked out the fabric and other materials for her sewing project.

Used mainly in chemistry, this term refers to substances formed when two or more elements are chemically bonded together. Compounds have specific properties and a fixed composition.

• Water (H2O) is a compound made up of hydrogen and oxygen.
• Organic compounds often contain carbon atoms.

In science and chemistry, elements are pure substances that consist of only one type of atom. Elements cannot be broken down into simpler substances by chemical means.

• Gold is a precious element with the symbol Au.
• The periodic table organizes all known elements.

Used in a general sense to refer to any material with specific properties, or more specifically in contexts involving chemistry or illicit use.

• The lab analyzed the chemical substances in the solution.
• He was caught in possession of illegal substances.

Commonly used to refer to both medicinal and recreational compounds, often with a negative connotation when referring to illegal use.

• She relies on prescription drugs to manage her condition.
• He was arrested for dealing drugs.

Refers specifically to substances used for medical treatment, especially those prescribed by healthcare professionals.

• You should take your medications as directed by your doctor.
• The pharmacy provides a wide range of over-the-counter medications.

Used in a professional or industry context, referring to manufactured medicinal drugs.

• The company specializes in developing new pharmaceuticals.
• Regulations for pharmaceuticals are very strict.