What is definition of two tine fork in kitchen?

There's no such thing as a "two tine fork" in the kitchen. A fork typically has four tines, not two.

Perhaps you're thinking of:

* A two-pronged fork: This is often used for picking up small items like olives or cherries.

* A spork: This is a utensil that combines a spoon and a fork, usually with two or three prongs.

Please clarify what you're looking for, and I can help you further.