pin down

phrasal verb·3 senses·particle down

Meanings

1

Hold someone in place by force

Why “down”? Something is pressed down and kept from rising again.

They pinned him down on the floor.
They held him in place on the floor by force.
Security pinned the man down.
Security held the man in place by force.
2

Get someone to commit to a clear answer or decision

Why “down”? Attention moves down to one exact point. A target is found, fixed, or specified.

It's hard to pin him down on a date.
It's hard to get him to commit to a date.
We pinned the supplier down on a price.
We got the supplier to commit to a clear price.
3

Identify or define something exactly

I can't quite pin down the smell.
I can't identify the smell exactly.
She pinned down the cause of the error.
She identified the cause of the error exactly.
I can't pin down what's wrong.
I can't precisely identify what's wrong.

Don't confuse with

pin downpin back

Pin down means hold someone in place by force. Pin back means listen very carefully.

Test yourself

They pinned him down on the floor. What does it mean?

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