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Preposition after verb

Bind by or bind to?

Bind by and bind to are both standard, but they express different relationships and meanings.

Quick answer

What is the difference between bind by and bind to?

Use bind by for obligations, rules, or agreements that restrict someone. Use bind to for attachment, connection, or commitment to something.

Employees are bound by strict rules.
The treaty binds countries to common standards.
The pages were bound to a leather cover.

Choose the pattern by meaning

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

1
bound by + rule/agreement

Legal or moral obligation

Use bound by when rules, laws, or promises restrict actions.

We are bound by the contract.
2
bind to + object

Physical attachment

Use bind to for fastening or attaching one thing to another.

The rope was bound to the post.
3
bind someone to + duty/promise

Creating commitment

Bind to can describe obligations or commitments.

The oath bound him to secrecy.
4
bind together + group/things

Creating unity

Bind together means unite people or things.

Shared experiences bind together the community.

See the difference in context

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

Construction
Example
Meaning
bind by
Members are bound by the organisation's rules.
Describes obligation or restriction.
bind to
The agreement binds both parties to confidentiality.
Shows attachment or commitment to something.
bind with
They bound the package with string.
With introduces the material or tool used for binding.
bind into
The pages were bound into a single volume.
Into describes the resulting form or structure.

Common mistakes

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

Using by for physical attachment

Use to for attachment to another object.

✕ The boat was bound by the dock. ✓ The boat was bound to the dock.

Using to after legal restrictions

Bound by is the normal phrase for rules and laws.

✕ Employees are bound to company policies. ✓ Employees are bound by company policies.

Confusing bound to with certainty

Bound to can also mean certain to happen, which is a different meaning.

✕ We are bound to the law. ✓ We are bound by the law.

Quick practice

Choose the expression that matches the intended meaning.

1. All staff are bound ___ the confidentiality agreement.
2. The climber was bound ___ the safety rope.
3. The promise bound him ___ silence.

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Frequently asked questions

Is bound by only used in legal English?

No. It can also describe moral or social obligations.

Can bind to describe emotional commitment?

Yes. It can describe loyalty, duty, or long-term commitment.

What is the difference between bind by and bind with?

Bind by refers to obligation, while bind with usually names the material or tool used for tying or fastening.

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