One great Union, bound together in a single purpose by threat and loss.
It's different than playing with something and having a single purpose.
It was as if her life had a single purpose: to give birth to them.
Most people use their computers for a single dominant purpose.
She was built for a single purpose, and it still marks her.
They intend to use her for just one single purpose.
She focused on it with such a single purpose, time seemed to stop.
As the name implied, the college's single purpose was to train teachers.
We were made for a single purpose - to keep the darkness at bay.
She serves only a single purpose: to draw you on.
