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Prepositions after verbs

Defecate in or defecate on?

Use in for containers, enclosed spaces, or areas. Use on for surfaces. The choice depends on the physical relationship to the place.

Quick answer

When do we use in or on after defecate?

Use defecate in for enclosed spaces or containers: The cat defecated in the box. Use defecate on for surfaces: The bird defecated on the car.

The dog defecated in the garden.
A bird defecated on my jacket.
The child accidentally defecated in his trousers.

Choose the pattern by meaning

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

1
defecate in + container/place

Using enclosed spaces

Use in with boxes, toilets, rooms, clothing, and similar spaces.

The puppy defecated in the hallway.
2
defecate on + surface

Using exposed surfaces

Use on for tables, floors, cars, grass, and other surfaces.

The bird defecated on the balcony.

See the difference in context

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

Construction
Example
Meaning
defecate in + place
The cat defecated in the litter tray.
Refers to an enclosed or defined area.
defecate on + surface
The pigeon defecated on the statue.
Refers to a surface.
defecate at + location
The animal defecated at the entrance.
At focuses on the general point or location.

Common mistakes

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

Using on for containers

Use in for enclosed spaces such as boxes or toilets.

✕ The cat defecated on the litter box. ✓ The cat defecated in the litter box.

Using in for flat surfaces

Use on when something lands on a surface.

✕ The bird defecated in my car roof. ✓ The bird defecated on my car roof.

Quick practice

Choose the expression that matches the intended meaning.

1. The puppy defecated ___ the carpet.
2. The toddler defecated ___ his diaper.
3. The pigeon defecated ___ the statue.

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Frequently asked questions

Is defecate in more common than defecate on?

They are used in different situations. In refers to enclosed places, while on refers to surfaces.

Can I use at after defecate?

Yes, when you mean a general location rather than a surface or container.

Is this verb formal?

Yes. In everyday conversation, people often use less formal alternatives.

dabble, in, dabble, with "damage to" or "damage by"? dance to, with, on, in or for? "dangle from" or "dangle in"? dare to, for, on, as or at? dash to, into, out, from or on? daydream about, for, in, of or on? "debate in", "debate on" or "debate with"? deceive by, in, into, on or about? "decide on", "decide to" or "decide by"? declare in, by, on, to or as? decline in, by, from, to or for?

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