An institute is a permanent organizational body created for a certain purpose.

Much of my time is devoured by Internet without any certain purpose!

That the dream was made to order for a certain purpose.

Never dreaming, perhaps, that such knowledge could be used to a certain purpose.

Yet in a sense the story gave a certain purpose to my life.

Only the strong-willed and those with certain purpose could even look into this room.

They only turned themselves into things for a certain purpose and it would not be reasonable to suppose they'd need a car again.

At university they used to laugh about this dedication to a certain purpose.

I took them with me this morning for a certain purpose.

G-8 picked the leader of that group, but he had a certain definite purpose in mind.