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Preposition after adjective

Dead in, on, by, at, or of

Dead combines with different prepositions depending on meaning. Some combinations describe place, cause, or emotional reaction rather than a fixed adjective pattern.

Quick answer

How do prepositions work with dead?

Use dead in or dead on for location or situation, dead by for a deadline, dead at for lack of skill or reaction, and dead of for cause of death or strong emotion. The preposition usually changes the meaning.

The soldier was found dead in the field.
The battery was dead by morning.
She was dead at the scene.
He died dead of exhaustion.

Choose the pattern by meaning

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

1
dead in + place/situation

Location or condition

Use dead in to show where someone or something is dead or inactive.

The fish were dead in the water.
The phone was dead in my pocket.
2
dead on + surface/arrival

Position or exactness

Dead on can describe physical position or complete accuracy.

The insect lay dead on the floor.
Your estimate was dead on.
3
dead by + time

A state reached before a deadline

Use dead by with times or events.

The engine was dead by noon.
My laptop went dead by the end of the trip.
4
dead of + cause

Cause of death or intense feeling

Dead of commonly refers to illness, exhaustion, or strong emotion.

Many people were dead of hunger.
We were dead of tiredness after the hike.

See the difference in context

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

Construction
Example
Meaning
dead in
The animal was found dead in the forest.
Location of the dead person or thing.
dead on
Her prediction was dead on.
Completely accurate; also possible for physical position.
dead by
The battery will be dead by tomorrow.
No longer working before a certain time.
dead at
He was dead at the scene.
At introduces a location or event point.
dead of
They were nearly dead of cold.
Cause or extreme condition.

Common mistakes

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

Confusing dead of with dead from

Both are possible, but dead of is especially common with illness and conditions.

✕ He was dead by cancer. ✓ He was dead of cancer.

Using dead on for a place incorrectly

Use dead in for enclosed places.

✕ The bird was dead on the cage. ✓ The bird was dead in the cage.

Using dead by for cause

Dead by usually refers to time, not cause.

✕ She was dead by exhaustion. ✓ She was dead of exhaustion.

Quick practice

Choose the expression that matches the intended meaning.

1. The flowers were dead ___ the vase by evening.
2. My phone will be dead ___ tonight.
3. They were nearly dead ___ cold after the storm.

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Frequently asked questions

Is dead on an idiom?

Yes. Dead on often means exactly right or accurate.

Can dead at describe a place?

Yes. Expressions like dead at the scene use at for a location or event point.

What is the difference between dead of and dead from?

Both can describe cause, but dead of is especially common with disease, hunger, cold, and exhaustion.

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