Concrete refers to what exists physically and can be seen, touched, heard or measured: <em>She put the concrete details in the report — dates, names, invoice numbers.</em> Abstract refers to ideas, qualities and states that have no physical form: <em>Loyalty is an abstract noun; you can't photograph it.</em>
The core difference
The split is sensory. If something can register on one of the five senses, or on an instrument, it is concrete: a bicycle, a headache's cause, the smell of bread, forty-two millilitres. If it exists only as a concept in the mind, it is abstract: honesty, inflation, grief, potential.
The pair is used two ways, and they behave slightly differently. In grammar, it classifies nouns. In everyday writing, it describes how specific a statement is.
How to use each
- Concrete nouns: dog, table, thunder, Sarah, oxygen.
- Abstract nouns: courage, childhood, democracy, envy, distance. Most words ending in -ness, -ity, -ism and -tion are abstract.
- Everyday use: Give me something concrete — a number, a deadline. / His objections stayed abstract, so nobody could answer them.
The test
Could you photograph it, or point at it? If yes, it's concrete. A photograph of a judge is possible; a photograph of justice is not — you would only ever be photographing something that stands for it.
For sentences rather than nouns, use a stricter version: could two people disagree about whether it happened? Sales rose 12% in March is concrete and checkable. Momentum is building is abstract and is not.
The memory trick
Concrete the building material is heavy, grey and unmistakably there. Concrete the adjective means the same: something with weight you can knock on. Abstract shares its shape with abstract art, which deliberately refuses to depict any physical object.
The common mistake
Treating the pair as good versus bad. Abstract words are not weak by nature — freedom, consent and risk are among the most useful words we have, and no one can write about law, ethics or mathematics without them. The problem is only ever abstraction with nothing underneath it. Good writing usually alternates: state the abstract claim, then land it on something concrete.
The edge case
Some nouns sit on the fence. Music and heat are perceivable but not touchable; most grammars class them as concrete because the senses detect them. Others switch class with the sentence: a beauty (a particular thing that is beautiful) is concrete, while beauty (the quality) is abstract. Judge the word in its actual sentence, not from a list.
Frequently Asked Questions
Is "love" a concrete or abstract noun?
Abstract. Love is a state or feeling with no physical form — you can photograph people behaving lovingly, but not love itself.
What does "be more concrete" mean when someone says it about my writing?
It means replace generalities with specifics: names, numbers, dates, examples. Instead of "engagement improved considerably", write "replies doubled, from 40 a week to 80".
Are abstract nouns bad writing?
No. Whole subjects depend on them, and swapping every abstract word out produces childish prose. The fault is only abstraction that is never anchored — make the claim, then give one concrete instance of it.