Grammar. 1  Also called objective case. (in English and some other languages) a case specialized for the use of a form as the object of a transitive verb or of a preposition, as him in The boy hit him, or me in He comes to me with his troubles. 2  a word in that case.
pinning-a mutual promise of a couple not to date anyone else; on college campuses it was once signaled by the giving of a fraternity pin. promise-a verbal commitment by one person to another agreeing to do (or not to do) something in the future.
pin - attach or fasten with pins or as if with pins; pin the needle to the shirt. pin the blame on the innocent man. fasten, fix, secure - cause to be firmly attached; fasten the lock onto the door; she fixed her gaze on the man. unpin - remove the pins from; unfasten the pins of.