substance

substance — noun

1. Any physical material found in solid, liquid, or gaseous form that can be identi

1.nounB1
Definition

Any physical material found in solid, liquid, or gaseous form that can be identified by its chemical makeup — table salt, cooking oil, and glass are all examples.

Example

Gabriel wore gloves to handle the toxic substance in the laboratory.

collocation: toxic substance / hazardous substance

The soil contained a sticky black substance that smelled like oil.

adjective + substance describing physical properties

Common collocations
  • chemical substance
  • toxic substance
  • hazardous substance
  • solid substance
  • liquid substance
  • organic substance
  • unknown substance
Synonyms
  • matter

    broader; refers to anything that has mass and occupies space

  • material

    emphasises what something is made of for a practical purpose

  • element

    refers to a pure chemical substance that cannot be broken down

Grammar Patterns

a/an + [adjective] + substance

[adjective] + substance

Usage Note

Countable when naming or enumerating specific types: 'a dangerous substance', 'several chemical substances'. Uncountable when talking about physical matter in a general way: 'The substance was thick and dark.' The uncountable use is less common than the countable one.

Common Mistakes

Wood is a good building substance.
Wood is a good building material.
'material' is used for things you make objects from; 'substance' refers to a type of matter defined by composition.

2. An illegal drug or a drug that is considered harmful and is restricted or banned

2.nounB2
Definition

An illegal drug or a drug that is considered harmful and is restricted or banned by law.

Example

Aarav was arrested for selling controlled substances near a school.

collocation: controlled substance

Emily works at a clinic that helps people recover from substance abuse.

collocation: substance abuse

Common collocations
  • controlled substance
  • illegal substance
  • substance abuse
  • substance use
  • substance dependence
  • psychoactive substance
Synonyms
  • drug

    the everyday term; more common when context already makes the illegal nature clear

  • narcotic

    formal and more specific; often used in legal contexts for heroin, cocaine, etc.

Grammar Patterns

controlled + substance

illegal + substance

substance + abuse/use/dependence

Usage Note

This sense is commonly found in legal, medical, and policy contexts. The word 'substance' alone can imply the illegal meaning only in context — phrases like 'controlled substance' or 'substance abuse' make it explicit. In everyday conversation, 'drugs' is more common.

Common Mistakes

She was caught with a substance.
She was caught with an illegal substance.
Without 'illegal' or 'controlled', the sentence is ambiguous and could refer to any physical matter.

3. The central idea or core meaning contained in a spoken statement, written passag

3.nounB2
Definition

The central idea or core meaning contained in a spoken statement, written passage, or argument — the truly important content once you set aside minor details.

Example

I did not catch every detail, but I understood the substance of her speech.

the substance of + speech/argument/report

The substance of the report was that the company needed to cut costs immediately.

Common collocations
  • substance of (the argument)
  • substance of (the debate)
  • substance of (the speech)
  • substance of (the report)
Synonyms
  • gist

    more informal and conversational; the general sense without precision

  • essence

    more abstract; the fundamental nature that makes something what it is

  • core

    emphasises the central, non-negotiable part

  • meat

    informal; the substantial or important content

Antonyms
  • detail

    the small, specific pieces of information rather than the main idea

Grammar Patterns

the substance of + [noun phrase]

Usage Note

Uncountable — never 'a substance' in this sense. The phrase 'the substance of [something]' is the most common pattern. 'Substance' here contrasts with 'details', 'style', or 'form'.

Common Mistakes

The substance of the book were the main themes.
The substance of the book was the main themes.
'substance' is uncountable here and takes a singular verb.

4. The extent to which something has genuine importance, a solid factual basis, or

4.nounC1
Definition

The extent to which something has genuine importance, a solid factual basis, or serious meaning — rather than being shallow, empty, or merely decorative.

Example

The newspaper article had little substance and was mostly based on rumours.

collocation: have little / no substance

Aaron's argument lacked substance, so the committee did not take it seriously.

collocation: lack substance

Common collocations
  • lack substance
  • have substance
  • give substance to
  • without substance
  • little substance
  • real substance
Synonyms
  • weight

    emphasises influence or impact rather than factual basis

  • significance

    focuses on importance or meaning rather than factual solidity

  • validity

    narrower; specifically about being based on truth or logic

Antonyms

Grammar Patterns

lack + substance

have + substance

without + substance

give substance to + [noun]

Usage Note

Often used with 'lack', 'have', 'give', or 'without'. The phrase 'without substance' indicates something is empty or meaningless. Distinguish from sense 3 (MAIN POINT): sense 3 is about what the core content IS, while this sense is about whether it has any weight or seriousness at all.

Common Mistakes

The meeting had a substance.
The meeting had substance.
uncountable here, so no article.

5. Wealth, valuable possessions, or property; also refers to a person who has money

5.nounC1
Definition

Wealth, valuable possessions, or property; also refers to a person who has money and social influence.

Example

The old family lost its substance during the economic crisis of the 1990s.

formal register: 'lost its substance' meaning lost wealth

Wren married a man of substance who owned several successful businesses.

pattern: a man/woman of substance

Common collocations
  • man of substance
  • woman of substance
  • person of substance
  • family of substance
  • lost its substance
Synonyms
  • wealth

    the everyday term; broader and more common

  • fortune

    emphasises a large amount of money or valuable assets

  • property

    narrower; refers specifically to land, buildings, or possessions

Antonyms
  • poverty

    the state of being poor and lacking material resources

Grammar Patterns

a person/man/woman of substance

of substance (as a post-modifier)

Usage Note

This sense is formal and somewhat dated in modern English. It is most commonly found in the fixed phrase 'a man/woman of substance'. In modern usage, 'wealth' or 'property' is preferred for the material meaning.

Common Mistakes

He is a substance person.
He is a person of substance.
'substance' is not used as a pre-modifying adjective.
Idioms

a man/woman of substance

idiom

A person who is wealthy and influential.

Maya married a man of substance who owns several hotels.

Is Diego considered a woman of substance in the business world?

Word family

Synonym discussion

Sense: noun/3

All four words refer to the central part of something, but they differ in register and scope. 'Gist' is the most conversational — you use it when you did not follow every detail but got the general idea ('the gist of the conversation'). 'Essence' is more philosophical and abstract, focusing on the fundamental nature that makes something what it is ('the essence of democracy'). 'Core' is practical and concrete, often used for the non-negotiable centre of an argument or plan ('the core of the problem'). 'Meat' is informal and suggests the parts of a discussion that are substantive or interesting ('the meat of the lecture'). 'Substance' is the most neutral and flexible of the group, sitting between the informality of 'gist' and the abstraction of 'essence'. For example: you can get the gist of a joke, but you debate the substance of a policy.

gistessence ↗core ↗meat ↗

Common collocations

Nouns

  • chemical substance
  • toxic substance
  • dangerous substance
  • controlled substance
  • illegal substance

Phrases

  • substance abuse
  • substance use
  • substance of (the argument)
  • person of substance
  • man/woman of substance

Prepositions

  • of substance
  • in substance

Etymology

GreekLatinFrenchEnglish

'Substance' entered English in the 13th century through Old French 'substance', from Latin 'substantia', meaning 'being, essence, that which stands under'. The Latin word was itself a translation of the Greek 'hypostasis' (ὑπόστασις), which literally means 'that which stands under' — the underlying reality beneath appearances. Over time, the meaning broadened from 'essential nature' to include 'physical matter' and then 'wealth'. The 'illegal drug' sense developed in the mid-20th century as a euphemism in legal and medical writing.