A propósito

A propósito
 

I alway thought it meant on purpose, but I read somewhere that it meant by the way.
Could it possibly mean both? If so that could be very confusing.

That's true, it can have both meanings, but the context will make it clear:

No me golpeaste por accidente. Lo hiciste a propósito.
You didn't hit me by accident. You did it on purpose.

Esta es la carretera nueva. A propósito, ¿les dije que tardaron diez años en construirla?
This is the new road. By the way, did I tell you that they took 10 years to build it?


And it can also mean "about":

Estaba hablando a propósito de la escultura en el museo.
He/she was talking about the sculpture in the museum.

Thank you. You have made this quite clear. This phrase has several meanings, y a propósito es capaz de ser ambuguoso--a propósito o no.:D

The the word on purpose meaning A proposito.

I want to say Tu hicistes a proposito the pago de mi carro.

The translation correct is you made to purpose the pay of my car.

I hope that my example be correct.

If you have some suggest in it, then you don't hesitate to ask me.

Small correction.:)