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Preposition before noun

Of design, in design, or by design?

By design and in design are common in different meanings. Of design is uncommon except in specialised or formal structures.

Quick answer

Which expression should you use?

Use by design to mean intentional. Use in design when discussing the field, style, or structure of something. Of design is uncommon alone, but design of something is standard.

The error was by design, not accidental.
She works in design and branding.
The design of the bridge impressed the judges.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
by design

Showing intention

By design means deliberately or intentionally.

The system is simple by design.
The delay was by design, not a mistake.
2
in design

Talking about the field or structure

In design refers to design work, principles, or features.

She has a degree in design.
The two phones differ in design and size.
3
design of + noun

Naming what is designed

Design commonly takes of before the object.

The design of the building won an award.
We studied the design of the software carefully.
4
designed for + purpose

Expressing purpose

The adjective designed is commonly followed by for.

The tool is designed for children.
The course was designed for beginners.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
by design
The feature was removed by design.
Means intentionally or deliberately.
in design
The products are similar in design.
Refers to style, structure, or the professional field.
of design
The phrase of design alone is not a standard expression.
Usually unnatural without a larger structure.
design of
The design of the museum is modern.
Standard way to identify what is designed.

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using of design instead of design of

English normally places design before of.

✕ the of design the app ✓ the design of the app

Confusing by design with in design

By design means intentionally; in design refers to style or field.

✕ The mistake was in design. ✓ The mistake was by design.

Using in design for intention

In design does not usually mean deliberate.

✕ The delay happened in design. ✓ The delay happened by design.

Forgetting the object after design of

Design of normally needs a noun after it.

✕ We discussed the design of. ✓ We discussed the design of the website.

Quick practice

Choose the expression that matches the intended meaning.

1. The hidden feature was included ___ design.
2. She earned a degree ___ design.
3. The ___ the theatre was praised by critics.

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Frequently asked questions

What does by design mean?

It means something happened intentionally rather than accidentally.

When do we use in design?

Use it for the field of design or when comparing style and structure.

Is of design natural English?

Not usually by itself. English more often uses design of something.

of, about, against, to or for racism? of, about, for, in or on friendship? of, about, for, on or to thing? of, about, for, to or with sex? of, about, on, to or for moon? "of access" or "with access"? "of accommodation" or "for accommodation"? "of accuracy" or "for accuracy"? "of action" or "in action"? "of actor", "with actor" or "by actor"? "of address" or "to address"? "of administration" or "in administration"?

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